My dd had a bday in June for with all the girls in her class at our house. One of the girls that came gave her a gift card. The gift card was just put in a card, no gift card envelope or anything. The mom wrote from:girls name and $25 in permanent marker. When I went through the gifts, it look liked it was a used gift card and I figured it either didn't have any $$ on or it was a regift because the mom told me when she dropped her off that at first her dd didn't want to go but then changed her mind right before the party ( and no she didnt rsvp
DD misplaced the gift card and I finally found it under mattress in her room this weekend. I called the number to see if there was any money on it and there is $50!
Now I definitely think it was a regift and the mom had no idea how much money was on it..
Should I let the mom know?( I dont know her and they arent in the same class anymore)
or should I just let DD spend it since they gave it to her?

DD misplaced the gift card and I finally found it under mattress in her room this weekend. I called the number to see if there was any money on it and there is $50!
Now I definitely think it was a regift and the mom had no idea how much money was on it..
Should I let the mom know?( I dont know her and they arent in the same class anymore)
or should I just let DD spend it since they gave it to her?