How to send a late rent notice in Colorado

In Colorado, a late rent notice may be delivered by posting at the property, hand delivery; certified mail is not a listed method. The notice period is 10 days.

Last reviewed September 21, 2026 · Business research, not legal advice.

Requirement	Colorado late rent notice
Delivery method	Posting at the property, hand delivery — Cortul also sends a First-Class copy.
Notice period	10 days (calendar days)
Deemed received	When it is served
If refused or unclaimed	keep the certified record.
Statutes	C.R.S. §13-40-104; §13-40-107.5; §13-40-108

Step by step

Write the notice with every required element (the Colorado template in Cortul already has them).
Verify the recipient's mailing address with USPS.
Serve it the way Colorado law requires (hand delivery or posting at the property); mail alone doesn't serve it. Record the service in Cortul, which also mails a First-Class copy.
Keep the mailing and tracking records, and your own record of any service you did yourself.
Calendar the deadline from the mailing date.