1) Attest 2) Attest officially 3) Authenticate 4) Authenticate as a notary 5) Certify 6) Certify documents 7) Certify with a seal 8) Demonstrate 9) Evidence 10) Manifest 11) Notarise 12) Stamp and sign 1) Certify 2) Notarise 
Certification by a notary public to establish the authenticity of a signature on a legal document. Many legal documents, such as deeds and powers of attorney, must be notarized.
[v] - authenticate as a notary
to certify (a document, contract, etc.) or cause to become certified through a notary public.