How to negotiate with the property about doorbell?

1, you'd better find the owner or the person who went to get the doorbell with you to prove it. If not, you can remember who made the IOU. Communicate with them in a friendly way. 2. Rights protection? 500 bucks for a lawsuit is not worth it. You know you are wrong again, so don't be reasonable. Legal may not be reasonable. 4. See if you can find proof materials such as audio and video. 4, don't install the doorbell yourself, even the person who installed the doorbell can also say whether he rang the doorbell for your home. In other words, whose doorbell the property is for must be registered.