Owner; possessor — a person who holds or carries something, often used in legal or administrative contexts.
チケットの所持者本人のみ入場できます。
Only the person who holds the ticket may enter.
紛失した場合、所持者は警察に届け出てください。
If it is lost, the possessor should report it to the police.
所持者が身分証を提示した。
The possessor presented an ID.