Usually, they give you a warning to get them down and if you don't that can fine you for every sign.  

Any advice or warnings?

I'm getting the same warnings from my 1031 company.....

But I had to warn him: You don't calculate for 2015.

@Scott WagonerThank you for the warning!

I do not know how the court would have ruled but the unit would have been already rented out so I suspect the worse that could have happened is a fine.So this is a warning if you accept animals (and maybe even if you do not) there are places that will rubber stamp the service animal certificates. 

Warnings, cautions, etc.?

I think that it is (unfortunately) one of those things that no matter how many people warn you, you'll eventually learn the hard way.

My dad is retired and was a property and construction manager so that's another option but he tends to disappear without warning.  

there are special warnings required on the certificates, etc.