confirmationcard

noun
UK /ˌkɒnfəˈmeɪʃən kɑːd/
US /ˌkɑːnfərˈmeɪʃən kɑːrd/

A card that tells you something is definitely going to happen.

I got a confirmation card in the mail saying my birthday party is booked.


OTHER MEANINGS

2. A card sent to confirm a hotel or travel booking.

The hotel emailed a confirmation card for our two-night stay.

3. A card a church gives to someone who has completed a religious confirmation ceremony.

She kept her confirmation card in a special box with her baptism candle.

4. A small card used to check that an order or payment went through.

The shop gave me a confirmation card after I paid for the shoes.