diff --git a/src/registrar/forms/domain.py b/src/registrar/forms/domain.py
index ac96393b4..c08b43ba0 100644
--- a/src/registrar/forms/domain.py
+++ b/src/registrar/forms/domain.py
@@ -227,8 +227,6 @@ class AuthorizingOfficialContactForm(ContactForm):
         self.fields["email"].error_messages = {
             "required": "Enter an email address in the required format, like name@example.com."
         }
-        self.fields["phone"].error_messages["required"] = "Enter a phone number for your authorizing official."
-
 
 class DomainSecurityEmailForm(forms.Form):
     """Form for adding or editing a security email to a domain."""