Stamp out Andrew Jackson on your $20 bills with this Harriett Tubman stamp.
Print first 124 layers with PLA. Change to TPU filament for last 10 layers for best print on bill. Printing all layers with PLA is permissible.
Ink the relief with black ink and align the half round on the stamp with the treasury circle on the bill. Press firmly. You can pass these bills as real tender without violating any federal laws.