给singaporezhao 上课："acknowledge" [legal-dictionary]

http://legal-dictionary.thefreedictionary.com/acknowledge

acknowledge v.
1) generally to admit something, whether bad, good or indifferent.

2) to verify to a Notary Public or other officer (such as a County Clerk) that the signer executed (wrote, signed) the document like a deed, lease, or power of attorney, to make it certified as legal and suitable for recording.