Rent 11 days late, what should i do ?

[Rashee D.]

My tenant always pays rent late but usually before the 4th. This month the tenant still has not paid rent or reached out & today’s the 11th. I already informed the tenant that there will be a late fee than she told me that she was out of the country until the 14th. That was false because i live downstairs and i have seen her come in and out of the apartment on my camera.This is the first time this has happened and i want to avoid this from happening again, my tenants don’t know me as the landlord i act as the middle man/property manager What should i do ?