nonvalidation stamp

例句：

1. 1. The company'spolicy requires all documents to be signed bya non-verification stamp.
   公司的政策要求所有文件都需要由非验证印章签字。
2. 2.The non-verification stamp is usedto ensure the authenticity of the document.
   非验证印章用于确保文件的真实性。
3. 3. The signatureon the non-verification stamp isrequired to be witnessed by a notarypublic.
   非验证印章上的签名需要公证人见证。