Actions about vote for legal documents (4,5)

I believe the answer is:

deed polls

'legal documents' is the definition.
(deed poll is a kind of legal document)

'actions about vote' is the wordplay.
'actions' becomes 'deeds' (deed is a kind of action).
'about' indicates putting letters inside.
'vote' becomes 'poll' (polling is a kind of voting).
'deeds' enclosing 'poll' is 'DEED POLLS'.

'for' is the link.

I've seen this clue in The Daily Express.

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