Closed-end funds have a duration, and when this duration is reached, closed-end funds will become open-end funds. Because of the change in the nature of the fund, fund holders also need to re-register and confirm. This process is called capital confirmation. How to confirm the funds? For fund confirmation, investors need to go to the agency designated by the new open-end fund in person, and prepare the following materials: the original valid identity certificate, the original trading account of the investor's original trading place, and the completed and signed Application Form for Closed and Open Confirmation Business. Institutional investors also need to provide the original business license or registration book (a copy stamped with the official seal of the company is also acceptable), the original power of attorney for fund business stamped with the official seal of the company and the seal of the legal representative or authorized person, the original identity certificate of the authorized person, the original seal card, the original securities account, etc. After the investor submits the application, it is confirmed that the application share of the business is the number of fund shares of the original closed-end fund held by the investor when the fund is delisted, and the fund code and name are the code and name of the new open-end fund after the transformation. After checking that the identity of the investor is consistent with the applied share, the registration institution successfully confirms the right to confirm and registers the fund share due to the investor in the investor's fund account. Recently, more and more closed-end funds have expired, and investors have encountered more and more transformation problems. Because different closed-end funds have different transformation schemes, it has a certain impact on the daily operation of investors. Securities companies should also provide more thoughtful and comprehensive services in the transformation business from closed to open, so as to reduce the confusion of investors in business handling and operation.