You have not as yet said whether your association is formed under Title 23 or as a Nonprofit under Title 13B. I replied to a similar question some time ago with Reply #3074602. If you are a "statutory" association under Title 23 the following is my suggested procedure which I follow:
"This assumes your association is a statutory association established under Title 23. [An association established under Title 13-B (Nonprofit Corporation) will likely require filing in small claims court which I cannot comment on.]
Set a date when payments are due, approved by members at an annual meeting, then follow 23MRSA3104. If payments are not received according to a time specified then the association can follow the Notice of Claim procedure which hopefully will bear fruit at some point even though it may be in the future but interest has been accumulating. We use the interest rate that our town applies to unpaid property taxes, currently 7.00%."
Remember that the current revision to MRSA 23 uses the words "Notice of Claim" rather than "lien". I personally was not happy when the legislature changed the wording because most people who own property know what a "lien" means and it sure gets their attention. I'm not sure Notice of Claim has the same force but I do further suggest that the new wording be used to make any such document conform to the law. In recent collection action I have used the Notice of Claim wording but have also, in parenthesis, printed (LIEN) in the title just to call attention.