Snow96
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I think you are talking pocket veto. If a bill is sent to the president, if he doesn’t sign within 10 days it goes into effect without the president’s signature. However, if congress has adjourned and is not in session, after the 10 days it is not put into law (a pocket veto). I can’t remember the last time congress wasn’t in session.
If any Bill shall not be returned by the President within ten days (Sundays excepted) after it shall have been presented to him, the same shall be a Law, in like manner as if he had signed it, unless the Congress by their Adjournment prevent its return, in which case it shall not be a Law.