HSK V7-9
Correct

认证

/ rènzhèng / 
Strokes

Definition

to authenticate/to approve

Example

As a Verb
certify; identify; legalize; attest; authenticate
1
Rènzhèng
认证
yízhǔ
遗嘱

prove a will

2
Rènzhèng
认证
qiānmíng
签名

attest a signature

As a Noun
certification; authentication; attestation