I think you may have an issue denying someone based on source of income.

In my market place it really does not matter as it is illegal to deny section 8.  

When you deny an application do you give a reason?  

There is also certain criteria bank goes by  you don't make enough money denied.

The LL can always say that they informed your sister and she first said she was only dog sitting, then the next month she denied it, then the third month the LL saw the dogs the LL served the notice.I believe the above to be a very reasonable scenario and a court will understand and believe, so the big question is...what is on the lease ?

In a direct conversation with the Kitchen & Bath Manager for HD, he verbally agreed that the work was improper, but he was overruled by someone up the food chain and the client's request to have it corrected was denied.  

The fact that she denies having a dog after agreeing to the fee is just astounding.

A lot of lenders will say Yes without knowing the facts and then deny your loan once they get the details.Good luck.

I'm assuming then, that the management of the park has the right to deny a potential seller based on the same type of criteria as any landlord.

Owner of Company C says phone owner denies posting it, but will ask more questions and look into how his company got involved.