Where can I open the certificate of buying a house in a different place

The unit where the employee works performs the verification obligation, and issues the "Certificate of Purchase by Employees in Different Places", and the employee issues the certificate that the unit pays the basic old-age insurance for him. If the main qualification of the employee's unit does not exist, the villagers' committee, residents' committee or property department where the house is located shall issue the certificate of employee's purchase in different places. If an employee applies for renting a house outside Beijing, the employer shall also issue a rental certificate.