If a customer-facing Clover Mini is tethered to a merchant-facing Clover Mini or a merchant-facing Clover Station and a customer or merchant selects the option to print out the customer receipt, the merchant-facing Clover device will print out the receipt. The merchant can then take the receipt and hand it to the customer.
Reference Site: https://help.clover.com/faq/if-a-customer-prints-a-receipt-from-a-tethered-clover-mini-which-device-will-print-out-the-receipt/