Problem with what he said is he seems content to blame the whole thing on them and not acknowledge the bigger fish regarding the issue. 

You can ask them to sign an addendum acknowledging changes. 

I believe that Jekyll suspected that I was not trusting him by then - and he was well aware of my professional background to commit an obvious act of fraud.As my partner and I continued to take turns in prodding Jekyll to provide latest expenses invoice and to show us photographic proof that the property was secured, he simply stopped acknowledging us.I was able to find a reliable former co-worker of a friend, who was an Indy resident, and happened to be visiting California on business.

@Matt M. sounds about right.As they say- the first part of fixing a problem is acknowledging there is one.

We're right to acknowledge the risk of investment, because there are no guarantees in life except death and taxes. 

Does the bank acknowledge this? 

Acknowledge our tenants for their continued residency and for taking care of their home, our property, with a $10 Thanksgiving gift card to a local grocery.7.

Acknowledged.

Not acknowledge what they've done in writing in any way, shape or form.  

I normally just did an email agreement instead of any formal addendum, as it's just as good as long as they acknowledge the email.Something like, "Joe and Mary Smith will be moving in August 1st instead of August 8th per the lease signed on July 10th, with all terms per the lease, but to begin August 1st.