[qiān zì]
sign; affix one's signature
authentication
签字认证
sign a transfer
中转签字
sign away; sign over
签字让与财产
signature of bearer
持证人签字
handwriting signature
亲笔签字
forged signature
伪造签字
sign one's name to a cheque
在支票上签字
cancel a signature
签字作废
The agreement shall enter into force upon signature.
协定签字后立即生效。