Some places don't need it, according to local policies. Social security certificate is one of the most important materials, and local accounts do not need social security certificate. Foreign customers need to provide local tax payment certificate or social security certificate for more than one year when buying a house locally, otherwise they need to make a down payment of 50% for the first time, which is regarded as a second mortgage, and the interest rate rises 10%. If you buy a house with a local loan, you don't need to provide proof of social security. Mortgage to buy a house needs to provide the following materials: down payment invoice, house purchase contract, ID card, marriage certificate, work certificate, income certificate and bank account.