Hand them a form to take to the doctor that prescribed the animal for the doctor to sign. 

It can be "prescribed" by almost anyone, including a mental health counselor, physician, psychiatrist, or even a church pastor.There's a lot to navigate, a lot of unanswered questions, and HUD doesn't do much to help the Landlord.

Turns out her prescribing doctor (no longer in business) had never even met her but he diagnosed the disability and prescribed her medications for almost five years.

But in states where the right of redemption is based on the winning bid price, it would make sense to analyze winning bids and see if there were any that were significantly less than the ARV of the property and then go to the debtor, pay him $100 or so and buy his right of redemption and then pay the winning bidder the amount prescribed by law and then take the property.

**Failure to cure said violations within the prescribed time period will result in additional late and legal fees.Other Violations of your agreement are as follows: n/aPAYMENT MUST BE MADE WITH CASH, CASHIER’S CHECK, OR CERTFIED FUNDS.This is not an election to terminate your obligations to pay for the balance of the amount owed under your agreement.In the event you fail to pay the above amount and cure above violations within (3) THREE days of this notice, we shall immediately take legal action to recover monies for the unlawful detention of said premises together with such future amounts as may be due us for breach of your agreement.Most of the people that are buying these houses live very month to month.

It prescribes violations as a criminal act. 

“No Soldier shall, in time of peace be quartered in any house, without the consent of the Owner, nor in time of war, but in a manner to be prescribed by law.”Clearly these aren’t soldiers, but the purpose of the amendment is to prohibit government intrusion on private property. 

One thing to watch out for in my prescribed tactics is that it applies more to single families and small multis (4 or less).  

I  prescribe to a 3,000 year old investment  Philosophy that basically says divide your wealth in 3 even parts 1 part real estate 1 part business 1 part reserves.

There are websites selling support animal "certificates" and vests that are not prescribed by a doctor and legally not acceptable, BUT there are now websites with doctors selling service animal "certificates" and they are probably legally legitimate.