Just be sure to clarify that she isn’t a leaseholder but is authorized to reside in the unit.If you’re concerned about liability or want more peace of mind, you could ask the primary applicant for additional security, such as a higher deposit, depending on what’s allowed under Colorado law. 

In Texas there are quite a number of people with work permits that do not have socials.

Quote from @Zara Massoud: Your new PM is correct and the old ones were wrong.The property manager must have your social security or tax ID number on file.

Here's the deal: You don't need to withdraw and return the current security deposit just to collect the additional $100.

@Brady Bitter First what are you calling "securities"? 

Yes, you can deduct the 8 days rent from the security deposit.

They need a contract with email addresses and social security numbers to provide the amount.

.: The applicant needs a social security number or an individual tax ID number (ITIN).

Local investors can now get additional discounts by moving up the food chain and buying as notes and, on mortgages secured by vacant properties, utilizing the preREO strategy to generate revenue during foreclosure process.

I think she is equally responsible if she is 50 / 50 ownership per the offering and through thier own discussions on podcasts, social etc.