22 CFR 92.34: Fastening certificate to instrument.

The proper place for the certificate of acknowledgment is after the signature of the parties to the instrument. If the instrument is a printed form, the certificate will almost invariably be a part of the form. When Form FS-88 is used or when the certificate must be prepared on a sheet separate from the instrument, it should be fastened to the instrument as the last sheet. The method of fastening notarial certificates is prescribed in § 92.17.