How to send a security deposit itemization in Colorado

In Colorado, a security deposit itemization may be delivered by First-Class mail; certified mail is not a listed method. The notice period is 30 days.

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

Requirement	Colorado security deposit itemization
Delivery method	First-Class mail
Notice period	30 days (calendar days)
Deemed received	When it is mailed
If refused or unclaimed	keep the certified record.
Statutes	C.R.S. §38-12-103

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.
Send it by a method the law allows, and keep a mailed copy.
Keep the mailing and tracking records, and your own record of any service you did yourself.
Calendar the deadline from the mailing date.