It was an estate sale, and I wrote a letter to the seller and also pointed out some of the property's weaknesses relative to other properties in the area.

I hope thats not what the bad people are going to start doing taking a real BP members name and then just put a letter after it.

Also, what do people recommend for the physical letters?

I hand write letters to homes owned by snowbirds down here in FL.

I've been communicating with the tenant over the past few months to try and get them to set-up a payment plan and have had two letters sent from my lawyer outlining what is owed.  

When you buy a property in a C, D, or any-of-the-subsequent-letters-that-follow location, you are also making a decision about the types of tenant you will attract and the level of management required for that tenant. 

Adjustable, Balloon Payments, etc...?

yet took some rather odd actions.For example:Board started digging drains in front to of my house without ever acknowledging my engineer's letter about the damp, or coming in to look at where it was coming in.This was not recommended by the engineer.Meanwhile, I was waiting for funds to replace the carpets and while delays went on I had to move out the house because of the risk of mold. 

@Charles Robinson Jr definitely look into bandit signs and yellow letter marketing ,door to door is also great, the key is to get it under contract then sell/reassign the contract to someone like me .

(Besides buying a note with a 5-7 year balloon)