Tenant Keeps Coming Back to Get Their Mail, Bothering Tenant

[Slaiman Atayee]

I have a townhome rental and the former tenant has come back several times to get mail that is still being sent there. I bought the house vacant and BRRR'd it so she was never my tenant and I don't know her. I want to get her to stop coming to the home and bothering my tenant but trying to understand if she's breaking the law by accessing the property uninvited and/or touching my current tenants mail, and if i have any legal responsibility to give her her mail. I'm assuming she's at least trespassing on the property but any guidance on what grounds I have to get her to stop would be appreciated (maybe there's a lawyer or two on here). Thanks!