Health RisksSome pests can carry diseases or trigger allergies.

Nowadays Tenants all whine about having allergies, carpet is dirty, etc. 

The Landlord lost because the court said he should have protected the Tenant with the allergies instead of the Tenant with the ESA.

*Other tenants have allergies or phobias

Example, if you had shared furnace ducting in your rental and your existing tenant in the main house has severe pet allergies, and allowing a ESA for a new tenant would cause issues for the current tenant, you could deny the request.You can always call the Fair Housing Council of Oregon Hotline, 503-223-8197 Ext. 2 and ask for their guidance.

the person with Allergies or the Mental patient with the ESA dog?

No, had one applicant turn in copy of rental payment history, said no pets due to allergies, first line...drumroll...pet deposit!

Because of my wife having allergies I am generally more sensitive to such things than the average landlord/tenant, but I would generally say that if you are renting an unfurnished place then you should clean all surfaces and deep clean carpet. 

She does not want to pay.The tenants lease is up in July, I'm more than happy for her to move out now, but this since this is a 2br condo and she's splitting it with another stranger -- I don't expect the stranger will want to move out (or cover the full rent until July).So the question is - iIs it my responsibility to pay and perform a mold test with no evidence of mold besides "my allergies are acting up?"

Also, coming from someone with kids that have food allergies, you might want to have some kind of verbiage on air bnb or a big sign on the counter for guests that they should read the labels on the food and that you are not responsible for any adverse reactions.With that said, I plan on having coffee and tea k cups in my air bnb