D defs.my
Entry 3 senses Webster, 1913

Certify

/sẽrt'-əf-īˌ/ · Cer·ti·fy · IPA /ˈsɝ.tɪ.faɪ/
01 v. t. To give cetain information to; to assure; to make certain.
imp. & p. p. Certified; p. pr. & vb. n. Certifying
  1. 1.
    To give cetain information to; to assure; to make certain.
    “We certify the king, that . . . thou shalt have no portion on this side the river.” — Ezra iv. 16.
  2. 2.
    To give certain information of; to make certain, as a fact; to verify.
    “The industry of science at once certifies and greatly extends our knowledge of the vastness of the creation.” I. Taylor.
  3. 3.
    To testify to in writing; to make a declaration concerning, in writing, under hand, or hand and seal.
    “The judges shall certify their opinion to the chancellor, and upon such certificate the decree is usually founded.” Blackstone.
Phrases & compounds
Certified check — A bank check, the validity of which is certified by the bank on which it is drawn.