Attached postal cards like these are also sometimes called "reply postal cards."
This was a double postal card where the sender could write a message on one half and the recipient could detach and send back the reply using the pre-paid second half.
These were commonly used for business correspondence, surveys, or order confirmations.
These types of cards are listed in the Scott Specialized Catalogue of United States Postal Issues under Postal Stationery – Postal Cards.
Attached postal cards like these are also sometimes called "reply postal cards."
This was a double postal card where the sender could write a message on one half and the recipient could detach and send back the reply using the pre-paid second half.
These were commonly used for business correspondence, surveys, or order confirmations.
These types of cards are listed in the Scott Specialized Catalogue of United States Postal Issues under Postal Stationery – Postal Cards.