diff --git a/EnvelopeGenerator.Application/Envelopes/Queries/ReadSingleEnvelopeQuery.cs b/EnvelopeGenerator.Application/Envelopes/Queries/ReadSingleEnvelopeQuery.cs
new file mode 100644
index 00000000..feae8002
--- /dev/null
+++ b/EnvelopeGenerator.Application/Envelopes/Queries/ReadSingleEnvelopeQuery.cs
@@ -0,0 +1,71 @@
+using MediatR;
+using EnvelopeGenerator.Application.Common.Query;
+using EnvelopeGenerator.Application.Common.Dto;
+using AutoMapper;
+using DigitalData.Core.Abstraction.Application.Repository;
+using EnvelopeGenerator.Domain.Entities;
+using Microsoft.EntityFrameworkCore;
+
+namespace EnvelopeGenerator.Application.Envelopes.Queries;
+
+/// <summary>
+/// Repräsentiert eine Abfrage für einen einzelnen Umschlag.
+/// </summary>
+public record ReadSingleEnvelopeQuery : EnvelopeQueryBase, IRequest<EnvelopeDto?>
+{
+    /// <summary>
+    /// Optionaler Benutzerfilter; wenn gesetzt, werden nur Umschläge des Benutzers geladen.
+    /// </summary>
+    public int? UserId { get; init; }
+
+    /// <summary>
+    /// Setzt den Benutzerkontext für die Abfrage.
+    /// </summary>
+    public ReadSingleEnvelopeQuery Authorize(int userId) => this with { UserId = userId };
+}
+
+/// <summary>
+/// Verarbeitet <see cref="ReadSingleEnvelopeQuery"/> und liefert ein einzelnes <see cref="EnvelopeDto"/>-Ergebnis.
+/// </summary>
+public class ReadSingleEnvelopeQueryHandler : IRequestHandler<ReadSingleEnvelopeQuery, EnvelopeDto?>
+{
+    private readonly IRepository<Envelope> _repository;
+    private readonly IMapper _mapper;
+
+    /// <summary>
+    /// 
+    /// </summary>
+    /// <param name="repository"></param>
+    /// <param name="mapper"></param>
+    public ReadSingleEnvelopeQueryHandler(IRepository<Envelope> repository, IMapper mapper)
+    {
+        _repository = repository;
+        _mapper = mapper;
+    }
+
+    /// <summary>
+    /// 
+    /// </summary>
+    /// <param name="request"></param>
+    /// <param name="cancel"></param>
+    /// <returns></returns>
+    public async Task<EnvelopeDto?> Handle(ReadSingleEnvelopeQuery request, CancellationToken cancel)
+    {
+        var query = _repository.Query;
+
+        if (request.UserId is int userId)
+            query = query.Where(e => e.UserId == userId);
+
+        if (request.Id is int id)
+            query = query.Where(e => e.Id == id);
+
+        if (request.Uuid is string uuid)
+            query = query.Where(e => e.Uuid == uuid);
+
+        var envelope = await query
+            .Include(e => e.Documents)
+            .FirstOrDefaultAsync(cancel);
+
+        return envelope is null ? null : _mapper.Map<EnvelopeDto>(envelope);
+    }
+}