diff --git a/EnvelopeGenerator.Application/Contracts/Repositories/IEmailTemplateRepository.cs b/EnvelopeGenerator.Application/Contracts/Repositories/IEmailTemplateRepository.cs
index a36de569..73749745 100644
--- a/EnvelopeGenerator.Application/Contracts/Repositories/IEmailTemplateRepository.cs
+++ b/EnvelopeGenerator.Application/Contracts/Repositories/IEmailTemplateRepository.cs
@@ -7,7 +7,7 @@ namespace EnvelopeGenerator.Application.Contracts.Repositories;
 /// <summary>
 /// 
 /// </summary>
-[Obsolete("Use Read-method returning IReadQuery<TEntity> instead.")]
+[Obsolete("Use IRepository")]
 public interface IEmailTemplateRepository : ICRUDRepository<EmailTemplate, int>
 {
     /// <summary>
diff --git a/EnvelopeGenerator.Application/EmailTemplates/Commands/Reset/ResetEmailTemplateCommand.cs b/EnvelopeGenerator.Application/EmailTemplates/Commands/Reset/ResetEmailTemplateCommand.cs
index 1bcfda0e..fa988a54 100644
--- a/EnvelopeGenerator.Application/EmailTemplates/Commands/Reset/ResetEmailTemplateCommand.cs
+++ b/EnvelopeGenerator.Application/EmailTemplates/Commands/Reset/ResetEmailTemplateCommand.cs
@@ -5,20 +5,19 @@ namespace EnvelopeGenerator.Application.EmailTemplates.Commands.Reset;
 
 /// <summary>
 /// Ein Befehl zum Zurücksetzen einer E-Mail-Vorlage auf die Standardwerte.
-/// Erbt von <see cref="EmailTemplateQuery"/> und ermöglicht die Angabe einer optionalen ID und eines Typs der E-Mail-Vorlage.
+/// Erbt von <see cref="EmailTemplateQuery"/> und ermöglicht die Angabe einer optionalen ID und eines Typs der E-Mail-Vorlage.<br/><br/>
+/// Beispiele:<br/>
+/// 0 - DocumentReceived: Benachrichtigung über den Empfang eines Dokuments.<br/>
+/// 1 - DocumentSigned: Benachrichtigung über die Unterzeichnung eines Dokuments.<br/>
+/// 2 - DocumentDeleted: Benachrichtigung über das Löschen eines Dokuments.<br/>
+/// 3 - DocumentCompleted: Benachrichtigung über den Abschluss eines Dokuments.<br/>
+/// 4 - DocumentAccessCodeReceived: Benachrichtigung über den Erhalt eines Zugangscodes.<br/>
+/// 5 - DocumentShared: Benachrichtigung über das Teilen eines Dokuments.<br/>
+/// 6 - TotpSecret: Benachrichtigung über ein TOTP-Geheimnis.<br/>
+/// 7 - DocumentRejected_ADM (Für den Absender): Mail an den Absender, wenn das Dokument abgelehnt wird.<br/>
+/// 8 - DocumentRejected_REC (Für den ablehnenden Empfänger): Mail an den ablehnenden Empfänger, wenn das Dokument abgelehnt wird.<br/>
+/// 9 - DocumentRejected_REC_2 (Für sonstige Empfänger): Mail an andere Empfänger (Brief), wenn das Dokument abgelehnt wird.<br/>
 /// </summary>
-/// Beispiele:
-/// 0 - DocumentReceived: Benachrichtigung über den Empfang eines Dokuments.
-/// 1 - DocumentSigned: Benachrichtigung über die Unterzeichnung eines Dokuments.
-/// 2 - DocumentDeleted: Benachrichtigung über das Löschen eines Dokuments.
-/// 3 - DocumentCompleted: Benachrichtigung über den Abschluss eines Dokuments.
-/// 4 - DocumentAccessCodeReceived: Benachrichtigung über den Erhalt eines Zugangscodes.
-/// 5 - DocumentShared: Benachrichtigung über das Teilen eines Dokuments.
-/// 6 - TotpSecret: Benachrichtigung über ein TOTP-Geheimnis.
-/// 7 - DocumentRejected_ADM (Für den Absender): Mail an den Absender, wenn das Dokument abgelehnt wird.
-/// 8 - DocumentRejected_REC (Für den ablehnenden Empfänger): Mail an den ablehnenden Empfänger, wenn das Dokument abgelehnt wird.
-/// 9 - DocumentRejected_REC_2 (Für sonstige Empfänger): Mail an andere Empfänger (Brief), wenn das Dokument abgelehnt wird.
-/// </param>
 public record ResetEmailTemplateCommand : EmailTemplateQuery, IRequest
 {
     /// <summary>
@@ -34,7 +33,7 @@ public record ResetEmailTemplateCommand : EmailTemplateQuery, IRequest
     /// 
     /// </summary>
     /// <param name="Id">Die optionale ID der E-Mail-Vorlage, die zurückgesetzt werden soll.</param>
-    /// <param name="Type">Der Typ der E-Mail-Vorlage, z. B. <see cref="Constants.EmailTemplateType"/> (optional).
+    /// <param name="Type">Der Typ der E-Mail-Vorlage, z. B. <see cref="Constants.EmailTemplateType"/> (optional).</param>
     public ResetEmailTemplateCommand(int? Id = null, Constants.EmailTemplateType? Type = null) : base(Id, Type)
     {
     }
diff --git a/EnvelopeGenerator.Application/EmailTemplates/Queries/Read/ReadEmailTemplateQueryHandler.cs b/EnvelopeGenerator.Application/EmailTemplates/Queries/Read/ReadEmailTemplateQueryHandler.cs
index 433838dc..84478ee1 100644
--- a/EnvelopeGenerator.Application/EmailTemplates/Queries/Read/ReadEmailTemplateQueryHandler.cs
+++ b/EnvelopeGenerator.Application/EmailTemplates/Queries/Read/ReadEmailTemplateQueryHandler.cs
@@ -12,6 +12,7 @@ public class ReadEmailTemplateQueryHandler : IRequestHandler<ReadEmailTemplateQu
 {
     private readonly IMapper _mapper;
 
+    [Obsolete("Use Read-method returning IReadQuery<TEntity> instead.")]
     private readonly IEmailTemplateRepository _repository;
 
     /// <summary>
@@ -21,6 +22,7 @@ public class ReadEmailTemplateQueryHandler : IRequestHandler<ReadEmailTemplateQu
     /// <param name="repository">
     /// Die AutoMapper-Instanz, die zum Zuordnen von Objekten verwendet wird.
     /// </param>
+    [Obsolete("Use Read-method returning IReadQuery<TEntity> instead.")]
     public ReadEmailTemplateQueryHandler(IMapper mapper, IEmailTemplateRepository repository)
     {
         _mapper = mapper;
@@ -34,6 +36,7 @@ public class ReadEmailTemplateQueryHandler : IRequestHandler<ReadEmailTemplateQu
     /// <param name="cancellationToken"></param>
     /// <returns></returns>
     /// <exception cref="InvalidOperationException"></exception>
+    [Obsolete("Use IRepository")]
     public async Task<ReadEmailTemplateResponse?> Handle(ReadEmailTemplateQuery request, CancellationToken cancellationToken)
     {
         var temp = request.Id is int id
@@ -46,4 +49,4 @@ public class ReadEmailTemplateQueryHandler : IRequestHandler<ReadEmailTemplateQu
 
         return res;
     }
-}
+}
\ No newline at end of file
diff --git a/EnvelopeGenerator.Application/EnvelopeReceivers/Commands/Create/CreateEnvelopeReceiverCommand.cs b/EnvelopeGenerator.Application/EnvelopeReceivers/Commands/Create/CreateEnvelopeReceiverCommand.cs
index fb82abaf..10e8a292 100644
--- a/EnvelopeGenerator.Application/EnvelopeReceivers/Commands/Create/CreateEnvelopeReceiverCommand.cs
+++ b/EnvelopeGenerator.Application/EnvelopeReceivers/Commands/Create/CreateEnvelopeReceiverCommand.cs
@@ -18,4 +18,4 @@ public record CreateEnvelopeReceiverCommand(
     [Required] DocumentCreateCommand Document,
     [Required] IEnumerable<ReceiverGetOrCreateCommand> Receivers,
     bool TFAEnabled = false
-    ) : CreateEnvelopeCommand(Title, Message, TFAEnabled), IRequest<CreateEnvelopeReceiverResponse?>;
\ No newline at end of file
+    ) : CreateEnvelopeCommand(Title, Message, TFAEnabled), IRequest<CreateEnvelopeReceiverResponse>;
\ No newline at end of file
diff --git a/EnvelopeGenerator.Application/EnvelopeReceivers/Commands/Create/CreateEnvelopeReceiverCommandHandler.cs b/EnvelopeGenerator.Application/EnvelopeReceivers/Commands/Create/CreateEnvelopeReceiverCommandHandler.cs
index 3ab6fda1..b4315258 100644
--- a/EnvelopeGenerator.Application/EnvelopeReceivers/Commands/Create/CreateEnvelopeReceiverCommandHandler.cs
+++ b/EnvelopeGenerator.Application/EnvelopeReceivers/Commands/Create/CreateEnvelopeReceiverCommandHandler.cs
@@ -64,4 +64,4 @@ public class CreateEnvelopeReceiverCommandHandler : IRequestHandler<CreateEnvelo
         res.SentReceiver = _mapper.Map<IEnumerable<ReceiverReadDto>>(sentRecipients);
         return res;
     }
-}
+}
\ No newline at end of file
diff --git a/EnvelopeGenerator.Application/Extensions/CacheExtensions.cs b/EnvelopeGenerator.Application/Extensions/CacheExtensions.cs
index 5e9eebd8..16a533c4 100644
--- a/EnvelopeGenerator.Application/Extensions/CacheExtensions.cs
+++ b/EnvelopeGenerator.Application/Extensions/CacheExtensions.cs
@@ -1,131 +1,222 @@
 using Microsoft.Extensions.Caching.Distributed;
 
-namespace EnvelopeGenerator.Application.Extensions
+namespace EnvelopeGenerator.Application.Extensions;
+
+/// <summary>
+/// 
+/// </summary>
+public static class CacheExtensions
 {
-    public static class CacheExtensions
+    /// <summary>
+    /// 
+    /// </summary>
+    /// <param name="cache"></param>
+    /// <param name="key"></param>
+    /// <param name="value"></param>
+    /// <param name="options"></param>
+    /// <param name="cToken"></param>
+    /// <returns></returns>
+    public static Task SetLongAsync(this IDistributedCache cache, string key, long value, DistributedCacheEntryOptions? options = null, CancellationToken cToken = default)
+        => options is null
+            ? cache.SetAsync(key, BitConverter.GetBytes(value), token: cToken)
+            : cache.SetAsync(key, BitConverter.GetBytes(value), options: options, token: cToken);
+
+    /// <summary>
+    /// 
+    /// </summary>
+    /// <param name="cache"></param>
+    /// <param name="key"></param>
+    /// <param name="cToken"></param>
+    /// <returns></returns>
+    public static async Task<long?> GetLongAsync(this IDistributedCache cache, string key, CancellationToken cToken = default)
     {
-        public static Task SetLongAsync(this IDistributedCache cache, string key, long value, DistributedCacheEntryOptions? options = null, CancellationToken cToken = default)
-            => options is null
-                ? cache.SetAsync(key, BitConverter.GetBytes(value), token: cToken)
-                : cache.SetAsync(key, BitConverter.GetBytes(value), options: options, token: cToken);
-
-        public static async Task<long?> GetLongAsync(this IDistributedCache cache, string key, CancellationToken cToken = default)
-        {
-            var value = await cache.GetAsync(key, cToken);
-            return value is null ? null : BitConverter.ToInt64(value, 0);
-        }
-
-        public static Task SetDateTimeAsync(this IDistributedCache cache, string key, DateTime value, DistributedCacheEntryOptions? options = null, CancellationToken cToken = default)
-            => cache.SetLongAsync(key: key, value: value.Ticks, options: options, cToken: cToken);
-
-        public static async Task<DateTime?> GetDateTimeAsync(this IDistributedCache cache, string key, CancellationToken cToken = default)
-        {
-            var value = await cache.GetAsync(key, cToken);
-            return value is null ? null : new(BitConverter.ToInt64(value, 0));
-        }
-
-        public static Task SetTimeSpanAsync(this IDistributedCache cache, string key, TimeSpan value, DistributedCacheEntryOptions? options = null, CancellationToken cToken = default)
-            => cache.SetLongAsync(key: key, value: value.Ticks, options: options, cToken);
-
-        public static async Task<TimeSpan?> GetTimeSpanAsync(this IDistributedCache cache, string key, CancellationToken cToken = default)
-        {
-            var value = await cache.GetAsync(key, cToken);
-            return value is null ? null : new(BitConverter.ToInt64(value, 0));
-        }
-
-        //TODO: use code generator
-        #region GetOrSetAsync
-
-        #region string
-        public static async Task<string> GetOrSetAsync(this IDistributedCache cache, string key, Func<string> factory, DistributedCacheEntryOptions? options = null, bool cacheInBackground = false, CancellationToken cToken = default)
-        {
-            var value = await cache.GetStringAsync(key, cToken);
-            if (value is null)
-            {
-                // create new and save
-                value = factory();
-
-                Task CacheAsync() => options is null
-                        ? cache.SetStringAsync(key, value, cToken)
-                        : cache.SetStringAsync(key, value, options, cToken);
-
-                if (cacheInBackground)
-                    _ = Task.Run(async () => await CacheAsync(), cToken);
-                else
-                    await CacheAsync();
-            }
-
-            return value;
-        }
-
-        public static async Task<string> GetOrSetAsync(this IDistributedCache cache, string key, Func<Task<string>> factoryAsync, DistributedCacheEntryOptions? options = null, bool cacheInBackground = false, CancellationToken cToken = default)
-        {
-            var value = await cache.GetStringAsync(key, cToken);
-            if(value is null)
-            {
-                // create new and save
-                value = await factoryAsync();
-
-                Task CacheAsync() => options is null
-                    ? cache.SetStringAsync(key: key, value: value, token: cToken)
-                    : cache.SetStringAsync(key: key, value: value, options: options, token: cToken);
-
-                if (cacheInBackground)
-                    _ = Task.Run(async () => await CacheAsync(), cToken);
-                else
-                    await CacheAsync();
-            }
-
-            return value;
-        }
-        #endregion
-
-        #region DateTime
-        public static async Task<DateTime> GetOrSetAsync(this IDistributedCache cache, string key, Func<DateTime> factory, DistributedCacheEntryOptions? options = null, bool cacheInBackground = false, CancellationToken cToken = default)
-        {
-            if (await cache.GetDateTimeAsync(key, cToken) is DateTime dateTimeValue)
-                return dateTimeValue;
-            else
-            {
-                // create new and save
-                var newValue = factory();
-
-                Task CacheAsync() => options is null
-                        ? cache.SetDateTimeAsync(key, newValue, cToken: cToken)
-                        : cache.SetDateTimeAsync(key, newValue, options, cToken);
-
-                if (cacheInBackground)
-                    _ = Task.Run(async () => await CacheAsync(), cToken);
-                else
-                    await CacheAsync();
-
-                return newValue;
-            }
-        }
-
-        public static async Task<DateTime> GetOrSetAsync(this IDistributedCache cache, string key, Func<Task<DateTime>> factory, DistributedCacheEntryOptions? options = null, bool cacheInBackground = false, CancellationToken cToken = default)
-        {
-            if (await cache.GetDateTimeAsync(key, cToken) is DateTime dateTimeValue)
-                return dateTimeValue;
-            else
-            {
-                // create new and save
-                var newValue = await factory();
-
-                Task CacheAsync() => options is null
-                        ? cache.SetDateTimeAsync(key, newValue, cToken: cToken)
-                        : cache.SetDateTimeAsync(key, newValue, options, cToken);
-
-                if (cacheInBackground)
-                    _ = Task.Run(async () => await CacheAsync(), cToken);
-                else
-                    await CacheAsync();
-
-                return newValue;
-            }
-        }
-        #endregion
-
-        #endregion
+        var value = await cache.GetAsync(key, cToken);
+        return value is null ? null : BitConverter.ToInt64(value, 0);
     }
+
+    /// <summary>
+    /// 
+    /// </summary>
+    /// <param name="cache"></param>
+    /// <param name="key"></param>
+    /// <param name="value"></param>
+    /// <param name="options"></param>
+    /// <param name="cToken"></param>
+    /// <returns></returns>
+    public static Task SetDateTimeAsync(this IDistributedCache cache, string key, DateTime value, DistributedCacheEntryOptions? options = null, CancellationToken cToken = default)
+        => cache.SetLongAsync(key: key, value: value.Ticks, options: options, cToken: cToken);
+
+    /// <summary>
+    /// 
+    /// </summary>
+    /// <param name="cache"></param>
+    /// <param name="key"></param>
+    /// <param name="cToken"></param>
+    /// <returns></returns>
+    public static async Task<DateTime?> GetDateTimeAsync(this IDistributedCache cache, string key, CancellationToken cToken = default)
+    {
+        var value = await cache.GetAsync(key, cToken);
+        return value is null ? null : new(BitConverter.ToInt64(value, 0));
+    }
+
+    /// <summary>
+    /// 
+    /// </summary>
+    /// <param name="cache"></param>
+    /// <param name="key"></param>
+    /// <param name="value"></param>
+    /// <param name="options"></param>
+    /// <param name="cToken"></param>
+    /// <returns></returns>
+    public static Task SetTimeSpanAsync(this IDistributedCache cache, string key, TimeSpan value, DistributedCacheEntryOptions? options = null, CancellationToken cToken = default)
+        => cache.SetLongAsync(key: key, value: value.Ticks, options: options, cToken);
+
+    /// <summary>
+    /// 
+    /// </summary>
+    /// <param name="cache"></param>
+    /// <param name="key"></param>
+    /// <param name="cToken"></param>
+    /// <returns></returns>
+    public static async Task<TimeSpan?> GetTimeSpanAsync(this IDistributedCache cache, string key, CancellationToken cToken = default)
+    {
+        var value = await cache.GetAsync(key, cToken);
+        return value is null ? null : new(BitConverter.ToInt64(value, 0));
+    }
+
+    //TODO: use code generator
+    #region GetOrSetAsync
+
+    #region string
+
+    /// <summary>
+    /// 
+    /// </summary>
+    /// <param name="cache"></param>
+    /// <param name="key"></param>
+    /// <param name="factory"></param>
+    /// <param name="options"></param>
+    /// <param name="cacheInBackground"></param>
+    /// <param name="cToken"></param>
+    /// <returns></returns>
+    public static async Task<string> GetOrSetAsync(this IDistributedCache cache, string key, Func<string> factory, DistributedCacheEntryOptions? options = null, bool cacheInBackground = false, CancellationToken cToken = default)
+    {
+        var value = await cache.GetStringAsync(key, cToken);
+        if (value is null)
+        {
+            // create new and save
+            value = factory();
+
+            Task CacheAsync() => options is null
+                    ? cache.SetStringAsync(key, value, cToken)
+                    : cache.SetStringAsync(key, value, options, cToken);
+
+            if (cacheInBackground)
+                _ = Task.Run(async () => await CacheAsync(), cToken);
+            else
+                await CacheAsync();
+        }
+
+        return value;
+    }
+
+    /// <summary>
+    /// 
+    /// </summary>
+    /// <param name="cache"></param>
+    /// <param name="key"></param>
+    /// <param name="factoryAsync"></param>
+    /// <param name="options"></param>
+    /// <param name="cacheInBackground"></param>
+    /// <param name="cToken"></param>
+    /// <returns></returns>
+    public static async Task<string> GetOrSetAsync(this IDistributedCache cache, string key, Func<Task<string>> factoryAsync, DistributedCacheEntryOptions? options = null, bool cacheInBackground = false, CancellationToken cToken = default)
+    {
+        var value = await cache.GetStringAsync(key, cToken);
+        if(value is null)
+        {
+            // create new and save
+            value = await factoryAsync();
+
+            Task CacheAsync() => options is null
+                ? cache.SetStringAsync(key: key, value: value, token: cToken)
+                : cache.SetStringAsync(key: key, value: value, options: options, token: cToken);
+
+            if (cacheInBackground)
+                _ = Task.Run(async () => await CacheAsync(), cToken);
+            else
+                await CacheAsync();
+        }
+
+        return value;
+    }
+    #endregion
+
+    #region DateTime
+    /// <summary>
+    /// 
+    /// </summary>
+    /// <param name="cache"></param>
+    /// <param name="key"></param>
+    /// <param name="factory"></param>
+    /// <param name="options"></param>
+    /// <param name="cacheInBackground"></param>
+    /// <param name="cToken"></param>
+    /// <returns></returns>
+    public static async Task<DateTime> GetOrSetAsync(this IDistributedCache cache, string key, Func<DateTime> factory, DistributedCacheEntryOptions? options = null, bool cacheInBackground = false, CancellationToken cToken = default)
+    {
+        if (await cache.GetDateTimeAsync(key, cToken) is DateTime dateTimeValue)
+            return dateTimeValue;
+        else
+        {
+            // create new and save
+            var newValue = factory();
+
+            Task CacheAsync() => options is null
+                    ? cache.SetDateTimeAsync(key, newValue, cToken: cToken)
+                    : cache.SetDateTimeAsync(key, newValue, options, cToken);
+
+            if (cacheInBackground)
+                _ = Task.Run(async () => await CacheAsync(), cToken);
+            else
+                await CacheAsync();
+
+            return newValue;
+        }
+    }
+
+    /// <summary>
+    /// 
+    /// </summary>
+    /// <param name="cache"></param>
+    /// <param name="key"></param>
+    /// <param name="factory"></param>
+    /// <param name="options"></param>
+    /// <param name="cacheInBackground"></param>
+    /// <param name="cToken"></param>
+    /// <returns></returns>
+    public static async Task<DateTime> GetOrSetAsync(this IDistributedCache cache, string key, Func<Task<DateTime>> factory, DistributedCacheEntryOptions? options = null, bool cacheInBackground = false, CancellationToken cToken = default)
+    {
+        if (await cache.GetDateTimeAsync(key, cToken) is DateTime dateTimeValue)
+            return dateTimeValue;
+        else
+        {
+            // create new and save
+            var newValue = await factory();
+
+            Task CacheAsync() => options is null
+                    ? cache.SetDateTimeAsync(key, newValue, cToken: cToken)
+                    : cache.SetDateTimeAsync(key, newValue, options, cToken);
+
+            if (cacheInBackground)
+                _ = Task.Run(async () => await CacheAsync(), cToken);
+            else
+                await CacheAsync();
+
+            return newValue;
+        }
+    }
+    #endregion
+
+    #endregion
 }
\ No newline at end of file
diff --git a/EnvelopeGenerator.Application/Extensions/MappingExtensions.cs b/EnvelopeGenerator.Application/Extensions/MappingExtensions.cs
index 3a8a65f7..d2bde296 100644
--- a/EnvelopeGenerator.Application/Extensions/MappingExtensions.cs
+++ b/EnvelopeGenerator.Application/Extensions/MappingExtensions.cs
@@ -1,14 +1,27 @@
 using EnvelopeGenerator.Application.DTOs.Messaging;
 
-namespace EnvelopeGenerator.Application.Extensions
-{
-    public static class MappingExtensions
-    {
-        public static bool Ok(this GtxMessagingResponse gtxMessagingResponse)
-            => gtxMessagingResponse.TryGetValue("message-status", out var status)
-            && status?.ToString()?.ToLower() == "ok";
+namespace EnvelopeGenerator.Application.Extensions;
 
-        public static string ToBase64String(this byte[] bytes)
-            => Convert.ToBase64String(bytes);
-    }
+/// <summary>
+/// Provides extension methods for common mapping and conversion operations.
+/// </summary>
+public static class MappingExtensions
+{
+    /// <summary>
+    /// Determines whether the response indicates a successful "OK" message status.
+    /// </summary>
+    /// <param name="gtxMessagingResponse">The response object to evaluate.</param>
+    /// <returns><see langword="true"/> if the response contains a "message-status" key with a value of "ok"  (case-insensitive);
+    /// otherwise, <see langword="false"/>.</returns>
+    public static bool Ok(this GtxMessagingResponse gtxMessagingResponse)
+        => gtxMessagingResponse.TryGetValue("message-status", out var status)
+        && status?.ToString()?.ToLower() == "ok";
+
+    /// <summary>
+    /// Converts the specified byte array to its equivalent string representation encoded in base-64.
+    /// </summary>
+    /// <param name="bytes">The byte array to encode.</param>
+    /// <returns>A base-64 encoded string representation of the input byte array.</returns>
+    public static string ToBase64String(this byte[] bytes)
+        => Convert.ToBase64String(bytes);
 }
\ No newline at end of file
diff --git a/EnvelopeGenerator.Application/Histories/Queries/Read/ReadHistoryQueryHandler.cs b/EnvelopeGenerator.Application/Histories/Queries/Read/ReadHistoryQueryHandler.cs
index 95c650d5..91354492 100644
--- a/EnvelopeGenerator.Application/Histories/Queries/Read/ReadHistoryQueryHandler.cs
+++ b/EnvelopeGenerator.Application/Histories/Queries/Read/ReadHistoryQueryHandler.cs
@@ -10,6 +10,7 @@ namespace EnvelopeGenerator.Application.Histories.Queries.Read;
 /// </summary>
 public class ReadHistoryQueryHandler : IRequestHandler<ReadHistoryQuery, IEnumerable<ReadHistoryResponse>>
 {
+    [Obsolete("Use IRepository")]
     private readonly IEnvelopeHistoryRepository _repository;
 
     private readonly IMapper _mapper;
@@ -19,6 +20,7 @@ public class ReadHistoryQueryHandler : IRequestHandler<ReadHistoryQuery, IEnumer
     /// </summary>
     /// <param name="repository"></param>
     /// <param name="mapper"></param>
+    [Obsolete("Use IRepository")]
     public ReadHistoryQueryHandler(IEnvelopeHistoryRepository repository, IMapper mapper)
     {
         _repository = repository;
@@ -41,4 +43,4 @@ public class ReadHistoryQueryHandler : IRequestHandler<ReadHistoryQuery, IEnumer
                 
         return _mapper.Map<IEnumerable<ReadHistoryResponse>>(hists);
     }
-}
+}
\ No newline at end of file
diff --git a/EnvelopeGenerator.Application/Histories/Queries/Read/ReadHistoryResponse.cs b/EnvelopeGenerator.Application/Histories/Queries/Read/ReadHistoryResponse.cs
index 3c0cd725..7957839b 100644
--- a/EnvelopeGenerator.Application/Histories/Queries/Read/ReadHistoryResponse.cs
+++ b/EnvelopeGenerator.Application/Histories/Queries/Read/ReadHistoryResponse.cs
@@ -20,7 +20,7 @@ public class ReadHistoryResponse
     /// <summary>
     /// Gets or sets the reference identifier of the user who performed the action.
     /// </summary>
-    public string UserReference { get; set; }
+    public required string UserReference { get; set; }
 
     /// <summary>
     /// Gets or sets the status code of the envelope.