1. Write a description of the lost invoice to the tax bureau, and the tax bureau will open a letter, and then publish a statement that the lost invoice is invalid in the media. Then, with the approval of the tax bureau, the original ticket is invalid and the invoice is re-issued to the other unit.

2. issue a certificate to the developer to prove that the full amount has been paid. Then take the purchase contract and identity certificate to the developer to copy the certificate in triplicate, and then apply to the local tax department for reissue or entrust the developer to reissue it.

3. Go to the archives department of the real estate trading center to inquire about the filing information, and ask the tax department to copy and affix the official seal.