1. An agreement between two or more parties that establishes a legal obligation.
2. The act of carrying out the obligation.
3. Activities affecting a deposit account that are made at the request of the account holder.
4. Events that cause some change in the assets, liabilities or net worth of a business.
5. An act between a cardholder and a merchant or a cardholder and a member that results in activity on the cardholder account.