Was the check made out to your business name? Do you have any ID to show your local bank that you own the business so you can deposit it into your local bank acocunt?
Assuming you did no ship yet, suggest your just return the check and cancel the sale. I never ship until the check has been deposited and clear, like for 7 to 10 days.
You could ask th buyer to send another form of payment and then return the check, it's unlikely the buyer would take taht risk.
In future make sure it is clear in your shop tha check must be in your personal name.
