Utah Code § 53-5a-106: Alteration of number or mark on a handgun.

(1) An individual may not change, alter, remove, or obliterate the name of the maker, the model, manufacturer's number, or other mark of identification, including any distinguishing number or mark assigned by the department, on a handgun, without first having secured written permission from the department to make the change, alteration, removal,or obliteration.

(2) Except as provided in Subsection (3), a violation of Subsection (1) is a class A misdemeanor.

(3) This section does not apply to a handgun that is an antique firearm.