We have a long-term rental home with a tenant (a woman with minor kids) who has been renting since last September. She passed our background check (mid-600 credit score, no late rent history, verified income) and had been paying on time with occasional late payment. 

Now, she reached out to let us know that her fiancé is getting out of prison and she wants him to live with her. We’re trying to handle this properly and fairly while also protecting ourselves as landlords.

Our current plan is:

1. Clarify whether he will be a full-time occupant or just visiting. If he will be living there full-time and contributing to rent, we plan to require a full background check and update the lease to add him as a co-tenant.
2. If he won’t be financially responsible but will be staying there, we plan to request his basic info (name, SSN, etc.) for record-keeping.

Has anyone dealt with a similar situation? Any advice on what to consider before moving forward? We want to be fair while ensuring our property and rental agreement remain secure.

Thanks in advance for any insights!