diff --git a/gto/constants.py b/gto/constants.py
index e51915cd..c0a391f2 100644
--- a/gto/constants.py
+++ b/gto/constants.py
@@ -72,7 +72,7 @@ def assert_name_is_valid(value):
     if not check_string_is_valid(value, regex=name_re):
         raise ValidationError(
             f"Invalid value '{value}'. Only letters, numbers, '_', '-', '/' are allowed."
-            "Value must be of len >= 2 and must start and end with a letter or a number."
+            " Value must be of len >= 2 and must start and end with a letter or a number."
         )
 
 
@@ -81,7 +81,7 @@ def assert_fullname_is_valid(value):
         # fix error message to be regex-specific
         raise ValidationError(
             f"Invalid value '{value}'. Only letters, numbers, '_', '-', '/' are allowed."
-            "Value must be of len >= 2 and must start and end with a letter or a number."
+            " Value must be of len >= 2 and must start and end with a letter or a number."
         )
 
 
diff --git a/gto/registry.py b/gto/registry.py
index ba1ff944..380d491b 100644
--- a/gto/registry.py
+++ b/gto/registry.py
@@ -421,6 +421,8 @@ def deprecate(
         author: Optional[str] = None,
         author_email: Optional[str] = None,
     ) -> Optional[Deprecation]:
+        """Deprecate artifact"""
+        assert_fullname_is_valid(name)
         if force:
             if simple:
                 raise WrongArgs("Can't use 'force' with 'simple=True'")