The real estate license taken by others cannot be mortgaged. It is impossible to apply for a mortgage loan only with the real estate license. When the bank handles the real estate mortgage loan, it will require the borrower to be present in person to verify his identity. Even if the real estate license is lost or stolen, the rest can't apply for a mortgage loan under a pseudonym. Property ownership certificate, also known as house ownership certificate, is a legal document to prove the ownership of a house. The real estate license is issued by the national statutory registration authority, which records important information such as the location, area, structure and use of the house, and clarifies the ownership of the house. Real estate license is an important legal basis for housing transactions, mortgages, leases and other activities, and it is also an important basis for protecting the legitimate rights and interests of housing owners. The main contents of the real estate license include the basic information of the house, ownership information, attached drawings, registered items and the issuing authority. The isomorphism of these information forms the complete content of the real estate license, which ensures the clarity and legal effect of the house ownership. In housing transactions, mortgages, leasing and other activities, it is necessary to check the real estate license to ensure the legitimacy and security of the transaction.