Categories Glossary SF Post author By faq Post date 2020-06-23 No Comments on SF A type of form designation such as Form SF51, meaning a Standard Form used throughout the Federal Government Related posts: PTOL CD PTO JPG ← Service Mark → SFFAC Leave a Reply Cancel replyYour email address will not be published. Required fields are marked *Comment Name * Email * Website Save my name, email, and website in this browser for the next time I comment.