Without permission to be on the property, they are trespassers.

If they violate their lease (breaking it without landlord written permission), you'd find out when you call references.

It's easier to ask for forgiveness than to ask for permission.

I also once had a tenant who had at least 3 large fish tanks (also without prior permission).

A buyer or something along those lines may be able to pay for her moving costs if she lives in the property with mortgage servicer permission. 

I have received permissions from the officers that I have the freedom to hire whoever to get the needed repairs done ASAP , and we will worry about who pays what later.The entire trap arm is about 6' long about 20" above finished floor. 

Landlords don't have a right to enter the property without the tenants permission if there is a tenancy-at-will.

Just got permission from my wife.

To obtain fixed costs such as seller's mortgage, insurance fees, and annual property taxes, are wholesalers allowed to act as "power of attorney" and permission to obtain seller's information by contacting seller's mortgage company, insurance agent, etc?

The call ended with him agreeing to work with me in exchange for my time and permission to call him on his personal cell anytime for questions/advice/guidance.