Life hack: Instead of a voucher, you could also simply give banknotes as a gift, which would then 1. be valid in every shop and 2. have (practically) no expiry date. Crazy, I know.
They write 2 years on it to make people know that they can no longer use their deri year old voucher that they found when they moved, so they make a profit.
For technical reasons, we cannot currently offer a different validity period. However, we can extend the validity of expired vouchers without any problems.