To append is defined as to sign your name.
fix to; attach
To sew/stich with a tack (loose seam used to temporarily fasten pieces of cloth).
(Idiomatic) To keep; to store something for someone
Find another word for tag-on. In this page you can discover 4 synonyms, antonyms, idiomatic expressions, and related words for tag-on, like: append, tack on, tack and hang on.