When Selling a Product to Canada from the US, Who Pays the Import Duties?



I am based in the US and sold a product to a customer in Canada. I shipped it and not the customers wants to be reimbursed for the import duties. Per Amazon policy, who is responsible for paying the duties?

Thank you in advance!



Sold on .COM, the buyer is responsible.
Sold on .CA, you are responsible.


Thank you for your quick response!