What documents do I need to win a deduction dispute?
Whatever proves the retailer’s claim is wrong at the moment it says it went wrong. In practice that is the purchase order, the ASN with its transmission timestamp, the bill of lading, the signed proof of delivery, the packing list, and the invoice. For pricing claims, the agreed price list or promotional agreement covering the period.
The transmission timestamp is the one most often missing, because it lives in the EDI platform while the dispute gets filed out of the accounting system. A supplier who cannot show when a document was sent cannot contest a lateness penalty.
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