You can not ask probing questions or details about the disability, however you can ask for proof that they have a qualified disability and even a little about the nature of the disability. 

Examples are retired persons, some housewives and students, and disabled persons.

Nothing really, but even though I am not allowed to question her disability I could ask her what specific service he performs, and I bet it's something related to seizure, hmmm something like that, cough cough.

Are either/both of you disabled?

The wife has a disability and needs access to MobilityLink, the transit systems for folks who are disabled. 

Hi, I am trying to turn on the enhanced signature in my profile but the checkbox is disabled.

The gains can then be distributed once the following is met:It is made after the 5-year period beginning with the first taxable year for which a contribution was made to a Roth IRA set up for your benefit, andThe payment or distribution is:Made on or after the date you reach age 59½,Made because you are disabled(defined earlier),Made to a beneficiary or to your estate after your death, orOne that meets the requirements listed under First home underExceptionsin chapter 1 (up to a $10,000 lifetime limit).Contributions can be made to your Roth IRA after you reach age 70½ and you can leave amounts in your Roth IRA as long as you live.Roth Designated Account Solo 401kA designated Roth account is a separate account in a solo 401k that holds designated Roth contributions.A qualified distribution from a designated Roth Solo 401k account is excludable from gross income.

Your best cases will be seniors and folks on disability with limited means and limited choices.  

Bob is a disabled Navy veteran, who had a divorce, foreclosure and bankruptcy. 

Over 50% of all fair housing claim violations in 2015 were due to disability violations..