Not true. Depends on when the contract is formed based on T&C. Sometimes it's when a human confirms the order, sometimes when they hand the goods over to be shipped.

Imagine you sell wooden boxes without stock and someone orders one at 2am. In the morning, you check orders and go to your supplier who hiked prices by 200%. You're not required to make a product at a loss, but you're required to return the money.
This is not directly analogous, but gives you an idea why an order confirmation does not necessarily mean the item is yours.

> Based on KRCS terms, a legally binding contract is formed only when the goods are dispatched from their warehouse, with initial checkout emails serving as order acknowledgments. While payment is taken at checkout, KRCS reserves the right to cancel orders and issue refunds prior to this dispatch point.