Ds 11 had a birthday party after school - we went to lazer tag and took 7 boys. One of the boys never gets invited to parties (except ds's) He is lovely but very quiet and not that popular. Ds has always liked him. The friend (Joe) comes from a very strict family and I know they don't have much money. Anyway he gave ds a gift card but when we went to check the amount as ds wanted to buy a book - it said £0.00 balance. DH said he would cover the book amount and to forget about card. However if I was the mum or dad and I had forked out money for a gift card I would be really annoyed if it was a dud and would want to know. What would you do? I don't know the parents as they keep themselves to themselves and ds has never been invited over