​Customers Purchasing for Re-Sale

Hi, I own a small outdoor shop that does online and in-store sales. Over the last few years, we’ve seen a huge increase in orders for particular US brands (mainly Patagonia and Arc’teryx) from customers who are clearly reselling. Billing addresses in China, shipping to industrial locations in port cities, buying entire size runs of a single product, etc.

The orders are rarely marked by Shopify for fraud, and we’ve never gotten a chargeback, but I’m still slightly concerned with fulfilling these orders.

Has anyone experienced anything similar or have any advice?

EDIT: to clarify, the addresses were shipping to are in the US, but the billing addresses are mostly in China. We don’t know for sure if these are resellers or reshippers. We just want to make sure we don’t piss off the brands we distribute, while also not canceling orders we don’t need to.