There are several reasons for the withdrawal of the provident fund:

1. The balance of the provident fund account is insufficient: when you withdraw the provident fund, if the balance of the account is not enough to pay all the withdrawal amount, the repayment will occur. At this time, you need to make up the difference to complete the extraction.

2. Outstanding provident fund loans: If you have used the provident fund for loans and have not paid it off, you need to make up the outstanding loan amount before withdrawing the provident fund. If the loan has been paid off but the system has not been updated, there will also be situations that need to be repaid.

3. Incorrect contribution ratio between individuals and units: the provident fund is paid by individuals and units according to a certain proportion. If you or your unit make mistakes in paying the provident fund, it will lead to the asymmetry of the proportion of individuals and units, which will lead to the need to pay back when withdrawing the provident fund. If you encounter the situation that the withdrawal of the provident fund shows that you need to pay back, it is recommended to carefully check the withdrawal details first, understand the specific reasons, and contact the provident fund management agency for consultation and handling in time.