diff --git a/API_SQLuedo/API/Controllers/NotepadController.cs b/API_SQLuedo/API/Controllers/NotepadController.cs
index ca0f5be..df0bb09 100644
--- a/API_SQLuedo/API/Controllers/NotepadController.cs
+++ b/API_SQLuedo/API/Controllers/NotepadController.cs
@@ -44,4 +44,19 @@ public class NotepadController(ILogger<NotepadController> logger, INotePadServic
             return NotFound();
         }
     }
+    [HttpPost]
+    [ProducesResponseType(typeof(UserDto), 201)]
+    [ProducesResponseType(typeof(string), 409)]
+    public IActionResult CreateNotePad([FromBody] NotepadDto notepadDto)
+    {
+        try
+        {
+            var existingNotePad = notePadService.GetNotePadByIdUserAndIdInquiry(notepadDto.UserId, notepadDto.InquiryId);
+            return StatusCode(409, existingNotePad);
+        }
+        catch (ArgumentException)
+        {
+            return Ok(notePadService.CreateNotePad(notepadDto.Id, notepadDto.UserId, notepadDto.InquiryId, notepadDto.Notes));
+        }
+    }
 }
\ No newline at end of file
diff --git a/API_SQLuedo/API/Service/NotePadDataServiceApi.cs b/API_SQLuedo/API/Service/NotePadDataServiceApi.cs
index 1eca632..86dae41 100644
--- a/API_SQLuedo/API/Service/NotePadDataServiceApi.cs
+++ b/API_SQLuedo/API/Service/NotePadDataServiceApi.cs
@@ -11,4 +11,7 @@ public class NotePadDataServiceApi(INotePadService<NotepadEntity> notePadService
 
     public NotepadDto GetNotePadByIdUserAndIdInquiry(int idUser, int idInquiry) =>
         notePadService.GetNotePadByIdUserAndIdInquiry(idUser, idInquiry).FromEntityToDto();
+
+    public NotepadDto CreateNotePad(int id, int idUser, int idInquiry, string note) =>
+        notePadService.CreateNotePad(id, idUser, idInquiry, note).FromEntityToDto();
 }
\ No newline at end of file
diff --git a/API_SQLuedo/DbDataManager/Service/NotePadDataService.cs b/API_SQLuedo/DbDataManager/Service/NotePadDataService.cs
index 437fa66..49f10e3 100644
--- a/API_SQLuedo/DbDataManager/Service/NotePadDataService.cs
+++ b/API_SQLuedo/DbDataManager/Service/NotePadDataService.cs
@@ -34,4 +34,18 @@ public class NotePadDataService : INotePadService<NotepadEntity>
 
         return notPadEntity;
     }
+
+    public NotepadEntity CreateNotePad(int id, int idUser, int idInquiry, string note)
+    {
+        var notePadEntity = new NotepadEntity
+        {
+            Id = id,
+            UserId = idUser,
+            InquiryId = idInquiry,
+            Notes = note
+        };
+        DbContext.Notepads.Add(notePadEntity);
+        DbContext.SaveChangesAsync();
+        return notePadEntity;
+    }
 }
\ No newline at end of file
diff --git a/API_SQLuedo/Shared/INotePadService.cs b/API_SQLuedo/Shared/INotePadService.cs
index 4a3adcc..0693a22 100644
--- a/API_SQLuedo/Shared/INotePadService.cs
+++ b/API_SQLuedo/Shared/INotePadService.cs
@@ -1,8 +1,11 @@
+using Dto;
+
 namespace Shared;
 
 public interface INotePadService<TNotePad>
 {
     public TNotePad GetNotePadById(int id);
     public TNotePad GetNotePadByIdUserAndIdInquiry(int idUser, int idInquiry);
+    public TNotePad CreateNotePad(int id, int idUser, int idInquiry, string note);
 
 }
\ No newline at end of file