Final answer:
When the source of a financial transaction is canceled, the transaction may be rejected or incur an overdraft fee. Carrying a negative balance in your bank account can be expensive.
Step-by-step explanation:
In the context of a financial transaction, when the source of the transaction is canceled, it can have different consequences depending on the situation.
One possibility is that the transaction will be rejected by the merchant, and you will need to find another method of payment. Another possibility is that some banks allow you to spend more money than you have in your account but charge you an overdraft fee.
However, carrying a negative balance in your bank account can be costly.