Can I rent to someone who has no SSN?

[Nina Zou]

First time have this. Gf has all docs, BF has no documents, no SSN. He's been working  for a local restaurant for 5 years. 

Can I rent to them if income is enough? What's the risk?

[John Clark]

Quote from @Tom Fidrych:

The current landlord or owner may not be a good source outside of verification of occupancy. I'll say whatever the prospective landlord wants to hear when I'm trying to get someone out. 

I agree, but sometimes you get a moment of candor, or a pregnant pause that tells all.