Colorado Three-Day Notice to Terminate for Substantial Violation
Colorado Three-Day Notice to Terminate Tenancy for Substantial Violation
Before you use this notice: Confirm the conduct meets C.R.S. § 13-40-107.5(3). Section 13-40-107.5(5)(c) can bar possession when protected abuse caused or contributed to the alleged violation. Section 13-40-108(2) requires additional service steps after a tenant reports protected abuse.
Date of notice: [__/__/____]
To tenant(s): [FULL LEGAL NAME(S)]
From landlord or authorized agent: [NAME]
Property: [STREET ADDRESS, UNIT, CITY, COUNTY, COLORADO ZIP]
Grounds for termination
The following act or series of acts constitutes a substantial violation under C.R.S. § 13-40-107.5(3):
Person(s) involved and connection to tenancy: [TENANT / GUEST / INVITEE; NAMES]
What happened, where, and when: [SPECIFIC FACTS, LOCATION, AND DATES]
Statutory ground: [DESCRIBE THE APPLICABLE GROUND IN § 13-40-107.5(3)(a), (b), OR (c), INCLUDING THE REQUIRED ENDANGERMENT OR OFFENSE ELEMENTS]
Records supporting the stated ground, if attached: [IDENTIFY RECORDS OR WRITE NONE]
Notice to terminate and demand for possession
Pursuant to C.R.S. § 13-40-107.5(4), the tenancy for the property identified above terminates three days after service of this written notice, on [TERMINATION DATE]. You must vacate and deliver possession by that date. This notice does not offer an opportunity to cure the substantial violation.
If you remain in possession after termination, the landlord may seek possession in court under C.R.S. § 13-40-104(1)(d.5). This notice is not a court order.
Landlord, agent, or attorney signature: ______________________________
Printed name and capacity: [NAME AND CAPACITY]
Address, phone, and email: [ADDRESS]; [PHONE]; [EMAIL]
Record of service
Tenant served: [NAME]
Date and time of service: [__/__/____] at [TIME]
☐ Personal delivery: I delivered a copy to the known tenant occupying the property at [LOCATION].
☐ Delivery to person at property: I left a copy with [NAME], who is older than 15 and resides on or is in charge of the property, at [LOCATION].
☐ Posting after attempts: No one was on the property after I attempted personal service at least once on each of two separate days: [DATE/TIME 1] and [DATE/TIME 2]. I posted a copy conspicuously at [LOCATION] on [DATE/TIME].
☐ Protected-abuse service route: The tenant gave written or actual notice that the tenant is a victim-survivor covered by C.R.S. § 13-40-108(2). I made reasonable efforts at personal service on [DATE/TIME/RESULT OF EACH ATTEMPT]. After three unsuccessful attempts, I posted a copy conspicuously at [LOCATION] on [DATE/TIME] and sent the notice by ☐ certified mail ☐ commercial mail courier with delivery documentation on [DATE]. Tracking or delivery proof: [DETAILS].
Server signature: ______________________________
Printed name and contact: [NAME]; [PHONE OR ADDRESS]
About this template
- Last updated
- October 23, 2026
- Citations checked
- October 23, 2026
- Jurisdiction
- Colorado
- Category
- Landlord & Tenant
Legal authority
- C.R.S. § 13-40-104(1)(d.5) (unlawful detention after substantial-violation notice)
- C.R.S. § 13-40-107.5(3)-(5) (substantial violation; three-day termination notice and defenses)
- C.R.S. § 13-40-108 (service of notice)
Landlord-tenant paperwork governs who can stay in a property, on what terms, and what happens when something goes wrong. Leases, notices to quit, security deposit demands, and habitability complaints all have state and often city-specific requirements for timing, content, and service. Getting the paperwork right is what makes an eviction actually succeed or a security deposit actually come back, because judges regularly dismiss cases over small procedural mistakes.
Not legal advice
This template is provided for informational purposes. We recommend having an attorney review any legal document before signing, especially for high-value or complex matters.
Checked against the law it cites
A reviewer verified this template's legal citations against the official source on October 23, 2026.
C.R.S. § 13-40-104(1)(d.5) (checked October 23, 2026): "When such tenant or lessee holds over, without the permission of the landlord, contrary to any condition or covenant the violation of which is defined as a substantial violation in section 13-40-107.5, and notice in writing has been duly served upon such tenant or lessee in accordance with section 13-40-107.5"
C.R.S. § 13-40-107.5(3) (checked October 23, 2026): "As used in this section, 'substantial violation' means any act or series of acts by the tenant or any guest or invitee of the tenant that, when considered together: (a) Occurs on or near the premises and endangers the person or willfully and substantially endangers the property of the landlord, any co-tenant, or any person living on or near the premises"
C.R.S. § 13-40-107.5(4)(a) (checked October 23, 2026): "A tenancy may be terminated at any time on the basis of a substantial violation. The termination is effective three days after service of written notice to terminate tenancy."
C.R.S. § 13-40-107.5(4)(b) (checked October 23, 2026): "The notice to terminate tenancy must describe the property, the particular date when the tenancy will terminate, and the grounds for termination. The notice must be signed by the landlord or by the landlord's agent or attorney."
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