Abstract: A method and system for appending text to unused space left by a sender when transmitting text message to a wireless device of a recipient. An attach appendix function preferably implemented in software provides an appendix that is attached to the text message in the unused space. The software determines the maximum length in characters allowed per-message to this recipient, and whether there is sufficient space remaining for an appendix. If sufficient space is available, the software retrieves a suitable appendix from a database of pre-defined messages and appends it to the original message. The original message along with the chosen appendix is then transmitted to the recipient.