Seller is renting after closing

[Andrew Guza]

Seller asked to rent the house for couple of months after the sale of the house, until they find another home, which I agreed to. I bought the house. Now the seller is living in the rental and I will refer to them as renters.

 The renters paid for October, then went out of country for death in the family. Went out of country quickly before signing the lease,

I emailed the wife (don't know husbands contact info) and have not heard back from her yet.

Problems:

1) I need to get signed lease from them. 

2) Rent for November is due Nov 1st.

3) I have no keys to the house because right after the closing they paid October rent and went out of country

How to get them to sign the lease? What would you do?

I am worried that without signed lease it would be hard to evict them if things go sour (state Florida)

Thank you!