Once the smoke clears there will be vulture investors doing yellow letters to the lot owners you can count on that. 

So far, it has delivered on expectations.

GrumpyHare delivered on their end.

Sure enough, a few weeks later, I got a letter from an attorney, photos of his client injured from a slip and fall, and a demand letter for $10,000.

@Vito DiIennaWhile I have not had to get a Letter of No Objection myself, if I had to do it, I would go right the the DOB, go into the Office that you can get an official Cert of Occupancy and ask them what is the procedure to get the letter.Normally, you will need to provide evidence.

Readers: a broker is not the contractual party who is responsible to deliver the file and it's contents to you.

Majority of mold complaints are tenants panicking and/or trying to get free rent out of their landlord.If they do get an attorney involved, their attorney will send you a written notice, which will lay out the issues and often tell you to give the letter to your insurance company.Don't bother with this, but you can discuss with your agent.When you or your PMC (or both) receive a legal notice of a case started, that's when you want to get your insurance company involved.Recommend you keep a record of all your communications with your PMC about this issue.

So far, we have received this advise from appraisers in the Maple Heights area: 1) Attach all offers so the next appraiser can better understand the market value, 2) Provide a letter from the Maple Heights Building Department discussing the addition of the egress window making the bedroom conforming livable space, 3) provide comps for similar properties sold in the Maple Heights area (these do not have egress windows), and 4) create an itemized list of improvements and cost for renovations to the property.We are grateful to the Bigger Pockets community for their advice as well. 

Will mail be delivered even if A and B are not officially registered with the USPS?

Also understanding how things are put together, how siding works, gutters, etc (basically as many aspects of the home as possible)Having this knowledge will also help you from getting burned by contractors telling you things just so they can save time and money and deliver a crappy service.