Moving 1,100 Paying Customers Between Stripe Accounts in a 3-Hour Window

In a single 3-hour window at midnight US time, we moved 2,500 US customers from our Australian Stripe account to a new US Stripe account. Payment methods, credits, coupons, promo codes, and webhooks. Nobody got double-charged. Nobody lost access. No customer email went out, because from their side, nothing changed. This is what it took to make that boring outcome happen. Why we did it The company operates in Australia and the US, but until last week both regions ran on a single AU Stripe account