diff --git a/py4web/utils/auth.py b/py4web/utils/auth.py
index cb8984750..16247f05a 100644
--- a/py4web/utils/auth.py
+++ b/py4web/utils/auth.py
@@ -10,7 +10,7 @@
 import uuid
 
 from pydal.validators import (CRYPT, IS_EMAIL, IS_EQUAL_TO, IS_MATCH,
-                              IS_NOT_EMPTY, IS_NOT_IN_DB, IS_STRONG)
+                              IS_NOT_EMPTY, IS_NOT_IN_DB, IS_STRONG,ANY_OF,IS_ALPHANUMERIC,)
 from yatl.helpers import DIV, A
 
 from py4web import HTTP, URL, Field, action, redirect, request, response
@@ -365,14 +365,20 @@ def define_tables(self):
                 ),
                 Field(
                     "first_name",
-                    requires=ne,
+                    requires=[
+					            ne,
+            					ANY_OF([(IS_EMAIL()),IS_ALPHANUMERIC()]),
+            					],
                     label=self.param.messages["labels"].get("first_name"),
                 ),
                 Field(
                     "last_name",
-                    requires=ne,
-                    label=self.param.messages["labels"].get("last_name"),
-                ),
+                    requires=[
+					            ne,
+            					ANY_OF([(IS_EMAIL()),IS_ALPHANUMERIC()]),
+            					],
+            				label=self.param.messages["labels"].get("last_name"),
+            			),			
                 Field("sso_id", readable=False, writable=False),
                 Field("action_token", readable=False, writable=False),
                 Field(