Not a long term solution but might be ok for a short period of time or until they shape up or you get rid of them.Any electronic payment will allow a partial payment.

I was planning on sending them the notice electronically, in person and through certified mail.

They have demanded that we are not to contact them in any way by mail, electronic, or otherwise and if I contact them or come to the property they will have me arrested for trespassing and harassment.

Cozy provides this for electronic payments.

Electronic bill pay may mitigate that risk, but on the flip side, will mortgage companies allow you ongoing access to their customer's online account?

I live in Illinois and because they are digging for any kind of money they can get their greedy hands on the basic cost to file electronically is $600.

I told them that their bank statement provides this, in addition, they get a receipt electronically using the electronic method of payment we set up.

They have a landlord worthy washer that doesn't have electronics. 

You simply submit the number of hours the employee worked and they can direct deposit their pay into their account and issue electronic forms.

No checks, no mail, ever.The irony is that this condo association will *only* take checks, as they feel there is a high potential for fraud when paying electronically!