Drawback pays on proof: the goods you imported are the goods you exported or destroyed. A clean chain of custody file links entry, inventory, and export records so the claim survives audit.
The refund logic is simple: duty was paid on import, the goods left or were destroyed unused, so most of the duty comes back. Cash moves on the proof, though, and the proof is a chain. CBP must be able to follow specific goods from the entry line, through your warehouse and records, to the export line, without once taking your word for the connection.
That standard surprises brands whose inventory systems were built for selling, not for customs. A warehouse system knows what a SKU is and how many exist. Drawback needs to know which imported units, from which entry, became which exported units, and the system has to say so in records created at the time, not reconstructed for the claim.
Link one is import: the entry summary, commercial invoice, and duty payment record identifying the merchandise precisely. Link two is custody: receiving logs, inventory transactions, and production records if the goods entered manufacturing, showing the imported goods were held, used as claimed, or kept unused as the drawback type requires.
Link three is exit: the export filing, bill of lading, and proof of landing or the supervised destruction certificate, matched in quantity and description to the first two links. Auditors test the seams between links, because that is where identity quietly swaps from these goods to some similar goods we also had.
Commingling is the classic break. Imported and domestic units of the same SKU pooled in one bin can still support claims under the right accounting method, but only if the method was set up in advance and the records follow it exactly. Deciding at claim time that units were probably the imported ones is not a method.
Description drift breaks chains too. The entry says one thing, the inventory another, the export filing a third, each written by a different team in different language. Individually harmless, together they force an examiner to guess whether three descriptions name one product, and examiners do not guess in the claimant's favor.
Assign identity early: lot or entry linked tracking for drawback eligible goods from receiving onward, with the drawback flag visible in the warehouse system so handlers know these units have paperwork value. Standardize product descriptions across purchasing, inventory, and export documents from one master record.
Then rehearse the audit. Pick a past export, hand a colleague only the claim file, and ask them to walk the goods from entry to exit without asking anyone anything. Every question they have to ask out loud is a hole in the chain. Fixing holes in peacetime records is clerical work. Fixing them after a claim is denied is archaeology.
Claim on a rhythm, not in a panic at the deadline. Regular filings keep records fresh, keep the team's method practiced, and surface documentation problems while the people who made the records are still around to explain them. The statutory windows are generous, and brands still lose claims by treating them as distant.
Finally, keep the whole chain for the full retention period, organized by claim rather than by department. When an audit letter arrives years later, the file that answers it should be a box you pull, not a project you staff. Drawback rewards the organized at exactly the moment everyone else has moved on.
The unbroken record linking duty paid imported goods to their export or destruction: entry documents, inventory and custody records, and export or destruction proof that all describe the same goods.
Yes, under approved accounting methods such as FIFO or LIFO applied consistently and set up in advance. What fails is informal guessing at claim time about which units were the imported ones.
Because the chain is tested at its seams. If entry, inventory, and export documents describe the goods differently, an examiner cannot confirm they are the same merchandise, and the claim weakens.
Keep the complete claim file for the full statutory retention period, generally five years from the claim, organized by claim so an audit years later can be answered from the file alone.