HOA semi-annual dues delivered by non-forwarded US Mail

Our AZ HOA sends out its semi-annual dues invoices to all residents by the US Mail BUT USES a cheaper postage than First Class format. They send the notices in a cheaper "non-forwarded US Mail" format.

Accordingly, any resident that is out of the area (and has completed all the proper forwarding forms and supplied all necessary information with their local US POST office) DOES NOT RECEIVE THE semi-annual dues INVOICE.

Accordingly, if the resident does not somehow know to pay the proper semi-annual dues amount by the initial dues deadline date, the resident is assessed mounting fines and fees until the (NOW LATE) semi-annual dues are paid.

Questions:
1. Does sending out semi-annual dues invoices via a non-forwarding US Mail format constitute proper notice?
2. May an HOA assess fines and fees against that resident that did not receive an invoice due to being out of the area (the semi-annual dues invoice was sent by the HOA BUT NOT RECEIVED by the resident)? (BTW such fines and fees are held as a lien against the property)

Thanks to all those who respond

Echoing what Barbara said, here is what my CCRs have to say:

After adoption of a budget and determination of the annual
assessment per lot, the Association shall assess such sum by
promptly notifying all owners by delivering or mailing notice
thereof to the voting member representing each lot, at such
member's most recent address as shown by the books and records of
the Association. One-twelfth (1/12) of the annual assessment
shall be due and payable in advance to the Association on the
first day of each month regardless of whether or not members are
sent notice thereof.


They place the onus of paying dues/assessments on the member. If the member is not sure when or how much they owe, they should contact the association. I think it is reasonable that the association use the lowest cost method of mailing to save money for all of the owners.

In our case, we don't even mail individual invoices. We post a notice at the entry, and email reminders every quarter. For the one or two owners who have chosen not to use email, we slide the reminder under the front door. When I was treasurer I also emailed follow ups for owners where I didn't receive payment before they were actually late, but that was a courtesy, not a requirement.

The HOA doesn't use email?

The sending of a notice is just a reminder. Your still not excused for not paying your dues. The schedule should be written in your CC&R's or By-laws when should pay. Seems be a good idea to send it out on a nice post card. Which is not 1st class mail.

Mine only sends meeting notices via email if the owner has requested so in writing. A third of our 100 homeowners don't use rmail at all, much less own a computer or a smartphone. We do have many who would prefer email (as do I), but unless everyone has it you still have to do it the old fashioned way, too.