A promo code can be used for booking certain rates with payment by bank card or invoice. To do this:
Select the appropriate payment method on the booking page.
Check the “Use Promo Code” box. The order cost will decrease automatically.
Complete the booking.
If the order cost has not changed, it may be due to one of the following reasons:
the promo code has expired
you chose on-site payment instead of payment by bank card or invoice
the provider has limited promo code options for a specific rate.