CG 20 37

Additional Insured Endorsements: CG 20 10 vs CG 20 33 vs CG 20 37 — What the Form Numbers Actually Mean

When a subcontract says "name the GC as additional insured on form CG 20 10 04 13," that specific form number matters. Different AI endorsement forms cover different scopes — ongoing operations only, completed operations, or both — and the wrong form leaves a coverage gap on claims after the project finishes. Here's what each common endorsement does and why the specific version matters.