diff --git a/EnvelopeGenerator.Application/DTOs/EnvelopeReceiverReadOnly/EnvelopeReceiverReadOnlyCreateDto.cs b/EnvelopeGenerator.Application/DTOs/EnvelopeReceiverReadOnly/EnvelopeReceiverReadOnlyCreateDto.cs
index 88ae982e..434b9fd9 100644
--- a/EnvelopeGenerator.Application/DTOs/EnvelopeReceiverReadOnly/EnvelopeReceiverReadOnlyCreateDto.cs
+++ b/EnvelopeGenerator.Application/DTOs/EnvelopeReceiverReadOnly/EnvelopeReceiverReadOnlyCreateDto.cs
@@ -1,11 +1,15 @@
-using System.Text.Json.Serialization;
+using System.ComponentModel.DataAnnotations;
+using System.Text.Json.Serialization;
 
 namespace EnvelopeGenerator.Application.DTOs.EnvelopeReceiverReadOnly
 {
     public record EnvelopeReceiverReadOnlyCreateDto(
-        string ReceiverMail,
         DateTime DateValid)
     {
+        [EmailAddress]
+        [Required]
+        public required string ReceiverMail { get; init; }
+
         [JsonIgnore]
         public long? EnvelopeId { get; set; } = null;