Since buying a "second" home is formally 10% down at least (I will say there are some lenders who are not doing 10% down right now due to volatility of the market).  

These are the compliance auditors and examiners for institutions generally, this is still a gray area as you may have a small bank officer who has had to self-study through this maze , then you may have a compliance officer from a large institution who has attended formal training, so consider that. 

Nothing formal.

It's one thing to have a consultant help you with a really good formal background in the field.

Was just thinking something more formal (unsecured note) would help paper trail the source of funds if we do delayed financing.We qualified for loans on this and the AZ house without any consideration of rental income (STR or LTR) on the property being purchased, so I'm not concerned about lack of 2 years of rental income for this purchase and/or refi.We looked at expediting/rushing appraisal, but with AZ no appraiser would take the file, and it sounds like only one is willing on the OR property (wanted to charge $2500 and still be 6 weeks out), Based on phone conversations Friday if it's "on hold" even that may not be an options.

Same with judicial vs non-judicial jurisdictions.  

I can't believe there is not a formal, legal challenge to this. 

Other than that distinction without delving in to the tax structure of the entities and their respective corporate formalities, you can own property out of state in both entities, just make sure to register that entity in that state as a foreign entity, which will also subject you to that particular state's taxation regime. 

I am contacting you to formally request validation of the alleged debt concerning this account and to inform you that I hereby dispute the validity of this debt.

My answer is that they can not, an impossibility to perform by one who is not formally trained in servicing and collection.It would serve the public good if some would stop interpreting finance law as if to imply that just anyone off the street who did a seller financed deal can act in compliance, reading statutes does not explain all the details involved in processing, underwriting, originations or servicing of seller financed transactions, the statutes refer to other regulations and guidelines.