The second-hand house online sign cannot be signed. Now, it doesn't take effect if you don't sign it. Materials to be submitted for online signing of second-hand houses: Seller: ID card, household registration book, marriage certificate, real estate license, land certificate and real estate invoice.

Online signing of second-hand housing sales, that is, online signing of second-hand housing sales, means that after the buyers and sellers sign the second-hand housing sales contract, they must go to the relevant real estate departments for filing and publish information online.