I'm going to repeat what I said in a parent comment: > But what is your definition of "check to make sure the integration was working correctly"? Once you know

I'm going to repeat what I said in a parent comment: > But what is your definition of "check to make sure the integration was working correctly"? Once you know what was going wrong, it's easy but unhelpful to say "you should have checked to see if that thing was going wrong". I'm sure he checked that Canadian tax was working, because that's what he bought Stripe Tax for. He didn't expect it to silently screw up his US customer payments, because he did not need to pay tax for them. He reasonably expected that Stripe Tax should have no impact on the payment of invoices for which no tax is owed.