What should I do if I buy a bachelor's house and someone else seizes it?

According to your inquiry, we can consider the following aspects:

1. First, both parties who buy a bachelor's house should sign a house purchase agreement, check whether the house has a property right certificate, and go through the formalities of renaming and transferring to the property right department. This is the basis for ensuring the legality of purchase procedures and safeguarding rights in the future.

2. The reason why the house is occupied by others may be that Bachelor Han has sold the house to others, or the house has no formalities and title certificate at all. Bachelor Han can give it to anyone and be occupied by others. He can only sue Bachelor Han in court and demand the return of the original purchase price.

3. If you have signed a contract with the bachelor Han and actually changed his name to his own name, and the house is occupied by others, you can report to the public security organ and report the crime of trespassing on the house, and ask the public security to investigate and deal with it.

4. If the public security organ thinks that it is only a civil dispute after investigation, it will also mediate together, and the matter can be solved.

5. If the public security organ fails to mediate, it may bring a civil dispute lawsuit to the people's court, suing the bachelor for returning the original purchase price, or suing the current resident for vacating, that is, returning the original property.

I hope the above will help you!