[CONDO] [CO] Help with dealing with delinquent unit owner

Location: Colorado

I recently joined the board of a small self managed association - under 15 units total. A board member has been delinquent on assessments for over a year now. They have been making payments but on their own timeline and with no additional fees. It seems like because this is such a small community no formal process was ever implemented. There's been constant communication between board and owner but nothing like what I see is required by law, for example a formal written notice.

Of course now that I'm on the board this has become a pressing issue. Not because of me, I wasn't even aware of this situation. The owner emailed us an offer for a payment plan which we have accepted. There was nothing signed, no letter was created, just good faith from all parties I guess. The payment desdlines they themselves set have come and gone now and they have gone ghost in replies.

My question is since all communication was done through email do we need to start from square 1 with sending out a formal notice? Is the payment plan offered by owner null & void? Any guidance on next steps is greatly appreciated.

Author: Calm_Surprise_188