What should I pay attention to when my friend sells a house and asks me for a guarantee? What are the risks and legal responsibilities? (selling a house, not buying a house)

What problems should a friend pay attention to when he sells a house and asks you for a guarantee? What are the risks and legal responsibilities? For this matter, I personally think that your friend asked you to sell the house and let you make a guarantee. So what's wrong with the money and responsibility of this house? You have certain responsibilities as a guarantee. So personally, I think, for this kind of thing, we should first judge the relationship between you and your friends. If the relationship is particularly good, he and he have no other way to find someone else to guarantee. Or if your friend is honest and won't play any tricks, you can vouch for him, and there will always be no problem, but if the relationship between your is normal, your friend will especially play tricks. Do some small moves, then there may be problems in this process, which directly leads to your need to bear certain responsibilities. Therefore, it is not recommended that you vouch for him in this case. To sum up, this is my view on this matter, and I hope to adopt it.