CG 20 10 usually misses a pure lease relationship. Here's how CG 20 11 and CG 20 26 differ, and what to check before naming a landlord.
Landlords who want to be named on a tenant's general liability policy often reach for the endorsement that sounds closest to the job. For a lease relationship, that's frequently the wrong pick. The two forms most often considered are CG 20 10 and CG 20 11, and the difference between them matters more than the similar titles suggest.
Why CG 20 10 usually misses a lease
CG 20 10 extends additional insured status only for liability caused, in whole or in part, by the named insured's acts or omissions, or by those acting on its behalf, in the performance of the named insured's ongoing operations for the additional insured. The phrase doing the heavy lifting is "for the additional insured." A tenant running a shop isn't performing operations for its landlord. It's performing operations for itself, and the landlord simply provides the space. In my read, CG 20 10 is built for construction-style relationships, such as an owner and a contractor, and it doesn't fit a plain lessor-lessee exposure.
What CG 20 11 does differently
CG 20 11 is written for managers or lessors of premises. Instead of tying coverage to operations performed for the landlord, it extends to the landlord for liability arising out of the "ownership, maintenance, or use" of the leased premises. That language lines up more closely with how a landlord's exposure shows up in practice: a visitor gets hurt in a shared area, a property condition becomes the basis of a claim, and the landlord ends up named alongside the tenant.
Here's the thing, though. The right answer depends on what the lease relationship looks like and how the tenant's policy is written. Read the form language on the actual policy rather than relying on a form number alone. Two policies that cite the same endorsement can carry different schedules, different limits and different endorsements layered on top.
The retail store example
Consider a retail tenant. A customer is struck by a broom an employee was using and names the landlord in a bodily injury lawsuit. Because the injury stems from the insured's own acts, the claim sits squarely within the kind of exposure an ongoing-operations endorsement is designed to pick up.
Now change the facts. The customer trips on a defective floorboard that the tenant didn't cause and had no role in. That loss falls outside the tenant's operations, and the ongoing-operations endorsement wouldn't respond. The gap is real, and it's why the endorsement choice isn't just paperwork. A certificate can show the landlord as an additional insured while the policy only responds to a narrow set of facts.
Where CG 20 26 comes in
The guidance points to CG 20 26, Designated Person or Organization, for situations where the landlord wants additional insured status tied to the tenant's ongoing operations, but those operations aren't performed for the landlord. That's a different exposure from a lease that grants landlord-specific coverage, and it calls for a different form.
The same form also applies when there's no lease between the tenant and the landlord, but the tenant has agreed to name the landlord as an additional insured. In that arrangement, the agreement itself is the reason the endorsement exists. The absence of a formal lease doesn't remove the need to address the requirement on the policy.
What to check before the certificate goes out
Start by pinning down the actual relationship. Is there a written lease? Is the landlord being added because of a contract requirement? Are the tenant's operations performed for the landlord, or only on the premises? Those answers point toward the right form.
Next, read the endorsement wording instead of the title. Confirm the schedule names the landlord correctly and that the premises are described accurately. Then document the lease terms, the property and the tenant's operations. Many of these details only get examined after a loss, so having them settled in advance saves time and argument later. None of these steps guarantees that a claim will be paid, since coverage depends on the policy terms and the facts of the loss.
What this means for the lease
"Additional insured" is a label, not a coverage grant. The reach of that grant depends on which endorsement is attached and how its trigger is worded. Landlords and tenants who treat the form number as a formality can end up with a certificate that looks right and a policy that doesn't respond the way the lease assumed. My bet is that this question keeps coming up as commercial leases get more specific about insurance requirements, so it's worth raising with the broker while the lease is still being negotiated.
