- 保证 (bǎo zhèng): guarantee; to guarantee; to ensure; to safeguard; to pledge; CL: 個|个(gè)
- 签证 (qiān zhèng): visa; certificate; to certify; CL: 個|个(gè)
- 证明 (zhèng míng): proof; certificate; identification; testimonial; to prove; to testify; to confirm the truth of; CL: 個|个(gè)
*CL: Classifier/Measure Word