rubber stamp
tool that is used in office and administration; craft in which some type of ink made of dye or pigment is applied to an image or pattern that has been carved, molded, laser engraved or vulcanized, onto a sheet of rubber
en-GB/ˈɹʌbə ˈstæmp/
en-US/ˈɹʌbɚ ˈstæmp/