1. The English words for certificate are:
prove?v. Confirm; prove; ferment; prove is; show; the result is; prove the authenticity and validity of (will) ;It turned out to be; to show (one's) talents
demonstrate? v. prove; confirm; participate in the parade; demonstrate; display; reveal; performance
testify to?prove; testify
p>attest to?Proof; confirm
evidence?n.Based on; proof; sign; trace; evidence
2. Phrase collocation
Deep Water deepwater pass
tax-free certificate
letters patent
landing permit