But property assessments have ballooned recently. 

I also get cards and letters every few days wanting to buy my notes and properties that I own.

By mid November we received a letter from landlord tenant court notifying us that the property management is taking us to court for non payment of oct rent, now mind you in pa if license and inspections deemed a property not up to code the rent cannot be collected while in violation of said codes, they were not up to code by November either, so any who we went to court showed them our evidence and explained why we were not continuing on to live there, the ruling was withdrawn without prejudice?

You can also give a letter that gives both options.

We would just need to verify you have credit history here in the US, and an ITIN letter. 

Talking about demographics is touchy, but let's say they wrote us a letter and it was amazing, but they were the polar opposite at the time. 

I got an attorney at the title company to write a letter, and the daughter to consistently keep pushing the mortgage company. 

In the IRS Private Letter Ruling that caused people to worry about this they said they would consider it subject to self-employment taxes (schedule c) if you provide services above and beyond.

But the following year, a letter comes in the mail that says, "Here's your new tax bill... at a substantially higher rate."  

I would send a letter and request a time to meet with them to discuss.I do have a question on your local market.