Which term refers to a provision that modifies the coverage of the original contract?

The term that refers to a provision that modifies the coverage of the original contract is "endorsement." An endorsement is an document attached to an insurance policy that changes the terms of the original contract. It can add, remove, or alter coverage, thereby tailoring the policy to better fit the needs of the policyholder. Endorsements are commonly used in various types of insurance to address specific concerns or situations, ensuring that the policy remains relevant and applicable over time.

In contrast, an exclusion specifically refers to a provision that lists what is not covered by the insurance policy, effectively narrowing the scope of the coverage rather than modifying it. A certificate of insurance serves as proof of insurance coverage to a third party, detailing the coverage provided but not modifying the policy itself. Re-insurance is a complex financial transaction in which an insurance company transfers a portion of its risk to another insurer, but it does not modify individual insurance contracts.