How to Verify a Chinese Slate Supplier: 10-Point Checklist

Verifying an overseas supplier is the single most important step in your sourcing process. Here is our 10-point checklist.

Documentation Checks

• Business license with export rights
• CE / ASTM / EN test reports
• Quarry ownership or lease documents
• Factory audit report from a third party

Live Verification

Request a live video walkthrough of the quarry, production line, and packaging area. Ask to see your specific order being prepared.

Sample Verification

Order a random crate sample at market price — not a free hand-picked sample. Random samples reveal true quality consistency.