From where I am sitting, CA has its own set of unique issues.

I signed a contract for a very unique property.

Ask me anything ("AMA") you want to know or questions you might have and I'll do my best to answer or connect you with someone who can.My background: ~8 years professional environmental consultant and wildlife biologist (phase 1/2's, wetland delineation/permitting, oil & gas, etc); ~3 years in the oil and gas industry doing environmental work; partner in standing up one of the biggest wine grape vineyards in Texas by acreage, also currently standing up a high-end "custom crush" winery in the heart of West Texas vineyard country; ~6 years financial modeling/underwriting residential and unique real estate and business opportunities; 8 years total investing in real estate, mostly SFR and small MFR holdings in West Texas and DFWHope I can be helpful to you!

After all, the SSN is the primary/unique identifying number used in tenant/credit screening. 

I may have stumbled upon a unique opportunity to get a great commercial property with a seller willing to seller finance.

That is an incredibly unique advantage if you need it. 

I'm being serious.I had a unique relinquish property (rural 10 unit mixed-use) so I waited until under contract on that. 

@Isaac IslasIf he is not a citizen, he may need to apply for an ITIN before being able to purchase properties in the United States.There are many unique tax laws to consider when foreigners buy US Real Estate(ECI, FDAP, FIRPTA, etc).

So unless there is really something unique this person brings to the table that you can capitalize on, I would pass. 

Some people maybe facing some very unique problems which are going to require very unique answers.