31 CFR § 328.5 - Forms of endorsement.
(a) When presented by banks -
(1) For payment or exchange. The endorsement placed on a bearer security presented for payment or exchange by a bank should be in the following form:
(2) For redemption at par. The endorsement placed on a bearer security presented for redemption at par in payment of Federal estate taxes should be in the following form:
(b) For conversion to book-entry securities. The endorsement placed on a bearer security presented for conversion to a book-entry security shall be in the following form:
(c) When presented by Service Center Directors or District Directors, Internal Revenue Service. The endorsement placed on a bearer security by a Service Center Director or a District Director, Internal Revenue Service, should be in the following form: