1. Confirm identity and authority
Verify the legal company name, website domain, operating address, sales contact, invoicing entity, and relationship between the brand and the manufacturing site. Check whether the quotation, contract, payment account, and quality documents refer to the same entity.
2. Confirm technical and quality fit
Ask for sequence-specific experience, manufacturing stages, scale, purification, analytical methods, quality-system information, lot documentation, change control, deviations, and the proposed specification. Match the documentation to the intended use and jurisdiction.
3. Confirm logistics and compliance
Clarify packaging, storage, shipping conditions, export documents, customs responsibility, lead time, replacement terms, confidentiality, and data handling. For regulated or sensitive work, involve the responsible compliance and quality teams before placing an order.
A decision record is part of diligence
Keep the source URLs, documents reviewed, names of people contacted, dates, open questions, and the reason for the final decision. A dated record makes later supplier reviews easier and prevents a temporary marketing statement from becoming an undocumented assumption.
- Identity and corporate records
- Technical and sequence fit
- Quality and analytical evidence
- Logistics and export readiness
- Commercial and compliance controls