diff --git a/QRBeeApi/Services/QRBeeAPIService.cs b/QRBeeApi/Services/QRBeeAPIService.cs
index 43f6d71..1b05918 100644
--- a/QRBeeApi/Services/QRBeeAPIService.cs
+++ b/QRBeeApi/Services/QRBeeAPIService.cs
@@ -90,7 +90,7 @@ namespace QRBee.Api.Services
             var dateOfBirth        = request.DateOfBirth;
             var certificateRequest = request.CertificateRequest;
 
-            if (string.IsNullOrEmpty(name) || name.All(char.IsLetter) == false || name.Length >= MaxNameLength)
+            if (string.IsNullOrEmpty(name) || name.Length >= MaxNameLength)
             {
                 throw new ApplicationException($"Name \"{name}\" isn't valid");
             }