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WASHINGTON (AP) — Donald Trump is refusing to release his tax returns. But he has turned them over when he stood to make a profit, needed a loan or when a judge forced him.

No one who’s seen those documents is allowed to say what’s in them.

In all the cases reviewed by The Associated Press, each person, organization, company or government office that has seen copies of Trump’s tax returns is barred from discussing their contents. That leaves the public with only glimpses into what his tax returns contain.

Trump faces increased criticism from Democrat Hillary Clinton to release his tax returns after he said during the presidential debate that he was smart for not paying federal income taxes in some years. Since 1976, every major party nominee has released their returns.

(© Copyright 2016 The Associated Press. All Rights Reserved. This material may not be published, broadcast, rewritten or redistributed.)