diff --git a/EnvelopeGenerator.Web/Controllers/ReadOnlyController.cs b/EnvelopeGenerator.Web/Controllers/ReadOnlyController.cs
index 6dcc5acb..fe0af197 100644
--- a/EnvelopeGenerator.Web/Controllers/ReadOnlyController.cs
+++ b/EnvelopeGenerator.Web/Controllers/ReadOnlyController.cs
@@ -28,79 +28,75 @@ namespace EnvelopeGenerator.Web.Controllers
             _histService = histService;
         }
 
-        [HttpGet]
-        [Authorize]
-        public async Task<IActionResult> GetAllAsync()
-        {
-            var res = await _erroService.ReadAllAsync();
-            return  Ok(res);
-        }
-
         [HttpPost]
         [Authorize]
         public async Task<IActionResult> CreateAsync([FromBody] EnvelopeReceiverReadOnlyCreateDto createDto)
         {
-            //set AddedWho
-            var authReceiverMail = this.GetAuthReceiverMail();
-            if (authReceiverMail is null)
+            try
             {
-                _logger.LogError("Email clam is not found in envelope-receiver-read-only creation process. Create DTO is:\n {dto}", JsonConvert.SerializeObject(createDto));
-                return Unauthorized();
-            }
-
-            var envelopeId = this.GetAuthEnvelopeId();
-            if (envelopeId is null)
-            {
-                _logger.LogError("Envelope Id clam is not found in envelope-receiver-read-only creation process. Create DTO is:\n {dto}", JsonConvert.SerializeObject(createDto));
-                return Unauthorized();
-            }
-
-            createDto.AddedWho = authReceiverMail;
-            createDto.EnvelopeId = envelopeId;
-
-            // create entity
-            var creation_res = await _erroService.CreateAsync(createDto: createDto);
-
-            if (creation_res.IsFailed)
-            {
-                _logger.LogNotice(creation_res);
-                return StatusCode(StatusCodes.Status500InternalServerError);
-            }
-
-            //read new entity
-            var read_res = await _erroService.ReadByIdAsync(creation_res.Data);
-            if (read_res.IsFailed)
-            {
-                _logger.LogNotice(creation_res);
-                return StatusCode(StatusCodes.Status500InternalServerError);
-            }
-
-            var new_erro = read_res.Data;
-
-            //send email two receiver
-            return await _mailService.SendAsync(new_erro).ThenAsync<int, IActionResult>(SuccessAsync: async res =>
-            {
-                //TODO: implement multi-threading to history process (Task)
-                //TODO: remove casting after change the id type
-                var hist_res = await _histService.RecordAsync((int) createDto.EnvelopeId, createDto.AddedWho, Common.Constants.EnvelopeStatus.EnvelopeShared);
-                if (hist_res.IsFailed)
+                //set AddedWho
+                var authReceiverMail = this.GetAuthReceiverMail();
+                if (authReceiverMail is null)
                 {
-                    _logger.LogError("Although the envelope was sent as read-only, the EnvelopeShared hisotry could not be saved. Create DTO:\n{createDto}", JsonConvert.SerializeObject(createDto));
-                    _logger.LogNotice(hist_res.Notices);
+                    _logger.LogError("Email clam is not found in envelope-receiver-read-only creation process. Create DTO is:\n {dto}", JsonConvert.SerializeObject(createDto));
+                    return Unauthorized();
                 }
 
-                return Ok();
-            },
-            
-            Fail: (msg, ntc) =>
-            {
-                _logger.LogNotice(ntc);
-                return StatusCode(StatusCodes.Status500InternalServerError);
-            });
-        }
+                var envelopeId = this.GetAuthEnvelopeId();
+                if (envelopeId is null)
+                {
+                    _logger.LogError("Envelope Id clam is not found in envelope-receiver-read-only creation process. Create DTO is:\n {dto}", JsonConvert.SerializeObject(createDto));
+                    return Unauthorized();
+                }
 
-        [HttpGet("key/{readOnlyId}")]
-        public IActionResult CreateLink(long readOnlyId) => Ok(
-            Request.Headers["Origin"].ToString() + "/EnvelopeKey/" + readOnlyId.EncodeEnvelopeReceiverId());
+                createDto.AddedWho = authReceiverMail;
+                createDto.EnvelopeId = envelopeId;
+
+                // create entity
+                var creation_res = await _erroService.CreateAsync(createDto: createDto);
+
+                if (creation_res.IsFailed)
+                {
+                    _logger.LogNotice(creation_res);
+                    return StatusCode(StatusCodes.Status500InternalServerError);
+                }
+
+                //read new entity
+                var read_res = await _erroService.ReadByIdAsync(creation_res.Data);
+                if (read_res.IsFailed)
+                {
+                    _logger.LogNotice(creation_res);
+                    return StatusCode(StatusCodes.Status500InternalServerError);
+                }
+
+                var new_erro = read_res.Data;
+
+                //send email two receiver
+                return await _mailService.SendAsync(new_erro).ThenAsync<int, IActionResult>(SuccessAsync: async res =>
+                {
+                    //TODO: implement multi-threading to history process (Task)
+                    //TODO: remove casting after change the id type
+                    var hist_res = await _histService.RecordAsync((int)createDto.EnvelopeId, createDto.AddedWho, Common.Constants.EnvelopeStatus.EnvelopeShared);
+                    if (hist_res.IsFailed)
+                    {
+                        _logger.LogError("Although the envelope was sent as read-only, the EnvelopeShared hisotry could not be saved. Create DTO:\n{createDto}", JsonConvert.SerializeObject(createDto));
+                        _logger.LogNotice(hist_res.Notices);
+                    }
+
+                    return Ok();
+                },
+
+                Fail: (msg, ntc) =>
+                {
+                    _logger.LogNotice(ntc);
+                    return StatusCode(StatusCodes.Status500InternalServerError);
+                });
+            }
+            catch(Exception ex)
+            {
+                _logger.LogError(ex, "{Message}", ex.Message);
+                return StatusCode(StatusCodes.Status500InternalServerError);
+            }
+        }
     }
 }
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