Why are you begrudging the person a profit?

My point of view is that you're calling this person a partner (your words, not mine).

Being required to see the units in-person as a stipulation to closing the deal?

Any deals you can't make - refer them to the auction company and make a fee.Always look for PROFIT CENTER opportunities - referrals fees from investors or others - always be alert to profit opportunities.IDEA for cash flow ----- Work a PIGGY BACK PROGRAM ---- get on all mailing list of auction companies in your area - where there are auctions that are being held in front of the property -- Contact owners of properties in the neighborhood where there is going to be an auction - Script: letter or in person - "As a public and private service - I wanted to let you know there is going to be a real estate auction at 123 Main Street at 2 pm - you may want to attend - if you would like to sell your property at 2:15 pm I can make that arrangements for you - oh - there are no commissions or settlement cost and no advertising fee."

You are a smart person, a savvy investor, and have no knowledge of this individuals true motives.  

If there is a due on sale clause, it is the same effect as any violation of the mortgage or deed of trust, the remedies are spelled out in the document itself and usually include foreclosure.I believe what you are thinking of is a “fraudulent transfer”, which may be applicable when a property owner files bankruptcy and prior has transferred the deed to a trust that has another person as trustee, but which he is beneficiary and does not report such in his list of assets.

You don't have to put on a fake persona to impress clients 

"a person", as in THE person, not the grandson of grandson of grandson of......

. -- A report or result of a self-test (as that term is defined by regulation of the Secretary) shall be considered to be privileged under paragraph (2) if any person-(A) conducts, or authorizes an independent third party to conduct, a self- test of any aspect of a residential real estate related lending transaction of that person, or any part of that transaction, in order to determine the level or effectiveness of compliance with this title by that person; and(B) has identified any possible violation of this title by that person and has taken, or is taking, appropriate corrective action to address any such possible violation.(2) Privileged Self-Test. -- If a person meets the conditions specified in subparagraphs (A) and (B) of paragraph (1) with respect to a self-test described in that paragraph, any report or results of that self-test-(A) shall be privileged; and(B) may not be obtained or used by any applicant, department, or agency in any --(i) proceeding or civil action in which one or more violations of this title are alleged; or(ii) examination or investigation relating to compliance with this title.

Sounds like fraud or delusions, big time.Liens are usually against the property and against the person. A