Frequently Asked Questions

Does CBP require original paper documents, or is electronic documentation acceptable?

Electronic works. Claims are filed in ACE with supporting documents uploaded digitally within 24 hours of filing, and under the modernized rules, records kept in the normal course of business are acceptable evidence. Hard copies still count, so older records sitting in file boxes can be digitized and put to work.

Do manufacturing claims need different documentation?

Yes, they add a layer. Beyond the import and export records above, manufacturing claims need a bill of materials and production records that trace imported inputs into the exported finished article, plus a manufacturing ruling on file with CBP. That import-to-production-to-export chain is what CBP verifies.

How do you tie a specific export back to the right import?

Two ways. Direct identification matches exports to imports using lot or serial numbers, or a CBP-approved inventory accounting method such as FIFO when unique identifiers are not available. Substitution claims skip unit-level tracing entirely and match at the 8-digit HTS classification level instead.