mailback

noun
UK /ˈmeɪlbæk/
US /ˈmeɪlbæk/

A mailback is when you send something back by mail.

The store gave us a mailback envelope to return the broken toy.


OTHER MEANINGS

2. A prepaid envelope or label used to send an item back to a company.

Use the mailback inside the box to return the shoes for a refund.

3. The act of responding to a survey or form by sending it through the post.

The survey had a high mailback rate among older customers.

4. A service where a company collects an item from your home by post.

The phone company offers a free mailback program for old devices.