Buyer occupying property prior to purchase

[Ricardo Polanco]

Hi everyone, I am a new user of biggerpockets, I am selling a renovated property. I have it under contract and the closing is supposed to be by the beginning of November because of some delays with the title company. The buyer requested a transfer from his job to the city where the house is but now the job wants him to start work next week, I told him we can probably let him and his family occupy the property prior to the closing date.  Is there any type of document I can make the buyer sign for these 2 weeks he will be occupying the property in order to cover myself? I won't be charging him any rent, he will just pay for the utilities used for that period. 

Really Appreciate any suggestions.

Thank you.