1. Credit card overdue: ABC's credit card is overdue, and the bank can entrust a third party to collect it.

2. Apply for a loan: After applying for a loan from China Agricultural Bank, the bank may entrust a third party to contact the borrower to verify the relevant information.

3. Abnormal account: If the account of ABC is abnormal, such as being stolen or frozen, the bank may entrust a third party to contact the parties.