- In marketing research, placing a set of questions on a mailed omnibus questionnaire containing questions from various sponsors. 2.
- In direct mail/direct response marketing, bounceback, co-op mailing, third-party or swap mailing when a mail shot is inserted with another non-competitive mailing, e.g. gas/electricity/credit card bills.
- Sale of extra items such as accessories.
- Term for joining together two TV commercials.
Synonyms: swap mailing, third-party mailing