To use the Foxtrot physical gift certificate (card), you must select a product and present a certificate at the checkout when paying. To use the Foxtrot electronic gift certificate, you must print it out, select the product and present the certificate at the checkout when paying.
To use the Foxtrot electronic gift certificate in the online store, you need to select a product, go to the checkout page, click "Apply gift card" and enter the certificate code in the "Card number" field.
Electronic and physical gift cards can be used in one check. The number of certificates to pay for the purchase is unlimited, they can be summed up.