I do not want a confrontation with the tenants, although I am willing to do so if necessary.There is one complicating factor.

Address it only if they confront you.  

As a rule, they don't like confrontations.  

No specific confrontation or antimosity.  

the story starts in January of 2016, when i added a tenant to my one family house. 10 days later she decided to move her stuff in. she rented a one bedroom in my house and was bringing in her belonging that could fill a fill 1 bedroom apt. when she didn't have enough place to put her stuff she began to leave everything in the living room. when i confronted her about it, she began to act threatening and irrational. i thought "hey she is stressed. let her cool down. the following day i tried to talk to her and she really lost her mind. i told her "it was not going to work out and she had till the end of the month to find somewhere else to leave.

That way I immediately see that a payment has been posted, taking that one point of failure out of the process.They can schedule payments and you can request if you do not see it electronically too keeping the direct confrontation out of the picture.

My question is - should I confront the tenants about their statements?

COnfront this PM, and get rid of them.

The existing tenant witnessed a transaction take place out front of the building.Those are all the details I have.Should he confront the new tenant?

Whether it's kids or tenants, so much confrontation can be avoided and resolved by directing emotion from a person to a piece of paper with rules, rather than the rule maker.