After conducting laboratory analysis or appraisal, the laboratory analyst or appraiser shall issue a report of laboratory analysis or a conclusion of appraisal and affix his signature or seal to it.

化验人、鉴定人进行化验、鉴定后，应当出具化验报告、鉴定结论，并签字或者盖章。

youdao

In case the holder refuses to sign or affix his seal, or he or she is absent, the matter shall be indicated in the list.

持有人拒绝签名、盖章或者不在场的，应当在清单上注明。

youdao

After checking and up to the grade, the buyer receive the goods and affix his signature or stamp his unit seal on the seller's delivery order.

验收合格后，需方收取货物并在供方出货单上签字或加盖单位印章。

youdao

The Ballot Act of 1872 states that "the presiding officer of each station, as soon as is practicable after the close of poll, shall, in the presence of the agents of the candidates, make up (the ballot boxes) into separate packages sealed with his own seal and the seals of such agents of the candidates as desire to affix their seals".

BBC: BNP to put own seals on ballot boxes over fraud fears