No exchange taking place without purchaser's card

Bought a pair of pumps for my niece last week at Zara Tygervalley.<br> Paid with my card. Gave it as a gift, along with the slip (which is very impersonal already).<br> The shoe was a bit too tight so my sister took the slip (which was said to be the only requirement for an exchange by the assistant at Tygervally) along with the shoes to V&A who have kept a pair aside for her.<br> Upon the exchange, they've refused to exchange without having my bank card with.<br> <br> Not sure what the point of that is if it's an exchange only.<br> Literally taking the exact same product, in a bigger size, along with the original slip, & no crediting required, but unfortunately they still won't help. So basically my sister had to purchase the new pair. Such a schlep for something so simple. <br> <br> Basically this just puts people off purchasing gifts at Zara, because A) if it's not the correct size the person who was gifted would know the amount you've spent, & B) you would need the purchaser's card if it was purchased with a debit/cheque card.