Precautions:
1. Check the number of certificates carefully. If the two certificates are agreed, be sure to check whether they are complete;
2. Check the records of real estate license carefully.
3. Check the mortgage items recorded in the "Other Rights" column.
4. Ask for an official invoice for paying taxes and fees.
Tip: check the property rights of the house in time.
Even if the real estate license is entrusted, it is necessary to check the property right status of the purchased house with the housing administrative department and the land administrative department in time. If you find a "dangerous situation", such as a developer illegally setting a mortgage, you can claim your rights in time.