First Triplex Property W/ Tenant already in place

[Michael Monello]

Hello everyone, I finally made the move on a Triplex in Florida. I was curious to know what the first step to do when there is already a tenant in place. (House has not been closed on, but offer accepted).

This tenant is on a month-month lease and I would like to change it to a yearly lease and recieve a security deposit. Should I be requesting a background check or credit check or speak with the sellers agent about the current tenant? 

Theres no security deposits in place currently as well.