News This stamp lets you put Harriet Tubman on the $20 bill in an act of ‘civil disobedience’ May 24, 2019May 24, 2019 Joel Shannon, USA TODAY Comments Off on This stamp lets you put Harriet Tubman on the $20 bill in an act of ‘civil disobedience’ After Treasury Secretary Steve Mnuchin announced the delay of a Harriet Tubman $20 bill, some are turning to a stamp in an act of civil disobedience.