Or....
maybe the voucher is a check from Verizon Florida LLC (59-0397520) that you are supposed to make payable to Verizon somehow? If I wanted it to be in lawful money I might write: "one hundred and twenty-five and nine one hundredths dollars lawful money" somewhere on the face of the bill. The idea of a bill of exchange or check being sent incomplete with it being left to the recipient to fill it out is discussed in perhaps countless court cases and legal treatises.
Also, why release it to the United States Treasury unless you are paying your own taxes?