No. If you buy a voucher worth €50 and your shopping costs €65, you will be invited to pay the difference using a different payment method. Conversely, if your shopping only costs €45 and you are paying with a €50 voucher, €5 will remain on the voucher, which can be used at your convenience.
If the voucher cannot be spent across more than one transaction, this will be stated in the offer’s terms and conditions. See our terms and conditions on the benefits platform for more information on how to use your voucher.