I know that you also have to either deliver the notice in person or via certified mail.

Meetup.com is a good resource for those but some of the groups will also post here on Bigger Pockets Marketplace too.

But when they didn't make up the missing 2 months' rent, I sent them a Certified letter letting them know they were in default, and they needed to pay it by 10/15.

Or send them a certified letter?

Carefully read what you had them sign, notify them via certified mail (generally, 7 days' notice is needed in AZ), and schedule the HVAC person.

Don't delay because you have a double deposit.Double deposit, plus first month (prorated rent) and any other move-in cost before they get the keys in certified funds, no checks or promises to pay.  2.

For starters, hire an attorney in Cleveland, not Cincinnati.For awhile they were not doing evictions if landlords didn't get their properties lead certified.

The terms and conditions of this lease will continue to apply.”My point is that the Notices section directly above it states: “NOTICES: Any notice which either party may or is required to give, may be given by mailing the same, by certified mail, to Tenant at the premises, or to Owner at the address shown in Section 2.

-based, Associate Digital Bookkeeper certified, QuickBooks Online Pro Advisor certified, & Bookkeeping for Real Estate Investors certified.

The terms and conditions of this lease will continue to apply.”My point is that the Notices section directly above it states: “NOTICES: Any notice which either party may or is required to give, may be given by mailing the same, by certified mail, to Tenant at the premises, or to Owner at the address shown in Section 2.