There are 3 options to consider:

1. Use the recommended services of a Customs Broker to handle any services related to NAFTA such as record keeping, maintenance, and consulting.
2. Do not participate in NAFTA. Be charged the Most Favoured Nation duty rate on all transactions when NAFTA preferential duty rates apply.
3. Take care of all NAFTA issues yourself and do not get charged for performing those services. A Declaration letter on company letterhead is required for CBSA purposes.