Chops are used as a sign of good faith by all government officials from the president on down; and in Taiwan, stamping your chop is a legal requirement for signing a contract, filing a lawsuit, and opening an account or withdrawing money at any bank or post office.
上至總統，下至各政府官員交接，仍以印信為象徵物；簽訂契約、法律訴訟，或至銀行、郵局開戶、領件，都得蓋印章，才算完成合法程序。