Domestic USPS for Canadian retailer??

New Member
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My shipping is kinda wonky and my American followers are complaining about the outrageous canadapost rates. I go to USA twice a month and I would like the option for American customers to select domestic usps shipping from Buffalo. I set up multi origin shipping which seems to give me that option however I have the issue now that no products are located in my USA location. So it won’t allow USA customers to purchase. Is there a way to accomplish what I’m trying to do. Allow American customers to buy from my canadian inventory but shipped from my USA Location via USPS calculated rates??