A few months after leaving the hospital, I received a notice of arrears from the hospital, but I paid the fee when I transferred to the hospital.

1. Check the bill: First, check the bill carefully to ensure that all expenses are reasonable. If you find any wrong or unclear charges, you can contact the hospital and ask for an explanation.

2. Contact the hospital: If you think there is something wrong with the bill, you can contact the financial department or patient service department of the hospital to explain the situation to the hospital and ask for help to solve the problem.

3. Seek professional advice: If you are confused or uncertain about how to deal with the problems in the statement, you can seek professional legal or financial advice.