Shēnqǐng dàikuǎn shí xūyào tígōng dānbǎorén de bǎozhèngshū.
When applying for a loan, a guarantor's written guarantee is required.
Tips
usage
保证书 is a formal document in which someone guarantees something in writing. It differs from 证明书 (zhèngmíngshū, certificate of proof) in that it commits the signer to a future obligation, while 证明书 attests to an existing fact.
