From generated AI summary:
"Aldi has implemented a £10 pre-payment system for shoppers entering its checkout-free store in Greenwich. This pre-payment, or deposit, is taken from the customer's payment card before they can enter the store. The £10 amount is deducted from the final shopping cost when the customer leaves.
However, if the customer does not spend at least £10, they may have to wait several days or longer for a refund, as the timing of the refund is controlled by the customer's card issuer. This system applies to both app users and those who use contactless card payments."
Articles are available online that explain this in more detail. . . Just do a Web search.