come-backcard
nounUK /kʌm ˈbæk.kɑːd/
US /kʌm ˈbæk.kɑːrd/
A card you send back to someone who sent you one.
She mailed a come-backcard to her pen pal in Japan.
OTHER MEANINGS
2. A card used to reply to an invitation.
Please fill out the come-backcard to say if you can attend the party.
3. A card that comes back to you after being sent, like a returned note.
The teacher got her come-backcard from the reading program.
4. A small card you keep to remind yourself to return something.
He put a come-backcard in the library book so he would not forget it.