@Jeffrey H. Unfortunately, I cannot give you great detail. I looked through my emails, and I must have received the guidance over the phone because I cannot find anything in email. However, as I think about it, I think part of the issue may have been that every time the tenant provides any amount of money, it resets the clock and you have to provide a new 3-day notice to demand payment. With that said, in reading through the lease with the tenant at the time, I think it reads pretty well. Here are a few excerpts:
LEASE. [...] Upon termination date, Tenant shall be required to vacate the Premises unless one of the following circumstances occur: ... or (iii) Landlord willingly accepts new Rent from Tenant, which does not constitute past due Rent. In the event that Landlord accepts from Tenant new rent, a month-to-month tenancy shall be created.
DEFAULT. If Landlord determines that the Tenant is in default of this Agreement, Landlord shall provide Tenant with a notice of default, and Tenant shall have a limited number of days to cure the default unless otherwise excepted: (a) for the failure to pay rent when due, Tenant shall have three (3) days to cure; ... or if the default constitutes a subsequent or continuing default within twelve (12) months of a written warning by Landlord of a similar violation, Landlord may deliver a written notice to Tenant specifying the default and Landlord's intent to terminate this Agreement. In such event, Landlord may terminate this Agreement, and Tenant shall have seven (7) days from the date that the notice is delivered to vacate the premises. In addition, if this Agreement is terminated pursuant to this paragraph, Landlord may, at Landlord's option, declare the entire balance of rent payable hereunder to be immediately due and payable and may exercise any and all rights and remedies available to Landlord at law or in equity.
LATE CHARGE. [...] Any payments received will always be first applied to outstanding balances, late fees or other charges, with the balance of the payment then applied to the rent due.