Passport endorsements (5)
I believe the answer is:
visas
'passport endorsements' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for visas that I've seen before include "travel permits" , "More than one travel document" , "Travel documents required by some countries" , "They allow bearers to enter a country" , "Passport stamps permitting travel" .)