Remedy for wrongful accusations of privacy invasion and digital interference

[Jeff Cliff]

Hello,

One of the guests from one of the short term rental platforms stayed for a few months with a home owner in Northern California. Prior to leaving, the guest wrongfully accused the homeowner by stating the owner invaded his privacy by entering into his room in his absence and also somehow electronically interfering with his electronic devices and trying to hack him. None of which is true, the guest never offered any evidence besides blatantly accusing the owner.  The guest's motive is unclear, however, his behavior is extremely offensive, harassing and utterly disturbing for the homeowner. Are there any remedies or proactive measures the homeowner should take to safeguard his interest? Can the home owner take legal action against this guest for mental harassment and wrongful accusation?

Thanks in advance for your response.