Sometimes I highlight recently closed transactions, picture of a happy customer, etc. but don't link to properties for sale unless I am holding an open house.  

Besides posting on yelp or Angie's list, is there anyway to let potential future customers to know that these people are unscrupulous?

Tenants are customers...

I was working on a bid for customer, they seemed on the up and up.

It is rare for a builder to *not* finish out a subdevelopment.Are you building a custom house on their lot?

Remember, the credit card company is the advocate for their customer and are looking to protect them, the tenant. 

Instead as an example a broker/agent can have a client buyer/seller they represent and then have the opposite party as a customer performing ministerial acts.There is also deginated agency where you can designate different agents within a brokerage to work with opposing parties.   

Working there taught me a lot about customer service and hard work.  

I have a bearded dragon and it lives in a 40 gallon tank; my brother had an older iguana needed a custom in room set up.

@Grant Rothenburger I work in customer service for a retail company.