Wiktionary
unstaple
vb. (context transitive English) to remove staples from.
WordNet
unstaple
v. take the staples off; "unstaple the piece of paper from the receipt" [ant: staple]
Usage examples of "unstaple".
She fed copies and unstapled and restapled while the machine clicked rapidly and spat the reproductions through the collator.
One wrong answer or unstapled piece of paper, and Nero would expel them from Prufrock Preparatory School and send them into the waiting clutches of Coach Genghis, so the three children worked as hard as they could.