Import Questions

What is a supplemental information letter?

It is a new procedure that can be very beneficial to importers who wish to correct mistakes in entries. The procedures for issuing a supplemental information letter are fairly simple. The letter must be submitted in triplicate to the Customs entry section in the port where the entry was filed and must contain the following information:

• a list of the entries involved;
• the reason for the requested change;
• a revised CF-7501 (Entry Summary) containing the "Tender/Refund" stamp affixed and the dollar amount shown;
• appropriate supporting documentation or evidence; and
• a check for any additional duty being paid.

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