1. The names and numbers of documents must be strictly consistent, including commercial invoices, packing lists, bills of lading and insurance policies.

2. The amount on the document must be consistent with the amount stipulated in the letter of credit, including commodity price, freight and insurance premium.

3. The date on the document must be within the validity period stipulated in the letter of credit, and any document shall not expire.

4. The name and quantity of the goods must be consistent with those stipulated in the letter of credit, and any change must be agreed in writing by the buyer and the seller.

5. The port of shipment and the port of destination on the documents must be the same as stipulated in the letter of credit, and the goods must be shipped from the designated port of shipment.

6. The signatory on the document must be the person who has the right to sign, and the signature must be consistent with the provisions of the letter of credit.

7. The seal on the document must be consistent with that stipulated in the letter of credit. If the document needs to be stamped, it must be stamped with the official seal or legal person seal.