Most service contracts reach you through someone who gets paid when you say yes. The person at the desk may work for the dealer, the finance office may earn a share of the sale, and a website may be paid by the companies it describes. None of that is hidden in principle, but it is rarely the first thing said, and it should change how much weight you give the advice.
Name every hand that touches the sale
Write down each person or business that brought you this contract: the salesperson, the finance manager, the company whose name is printed on the form, the administrator that handles claims, and any website you read before you walked in. For each one, ask how they are paid. Is it a flat fee, a commission on the sale, a share of the price, or nothing at all? If the answer is not given plainly, ask for it in writing before you sign anything.
Separate the seller from the company that pays claims
The form usually names the company that issues the contract, which is the party legally responsible for paying covered repairs. It may also name a separate administrator that takes claims, and the seller is often neither. Find out which company is on the hook and which phone number you call when the car breaks down. Then compare that answer with who was paid for the sale. The two are often different businesses, and the gap between them is where questions get lost.
Ask what the advice would be without the commission
Put a direct question to the person recommending the contract: if you were not paid for this sale, would you still suggest this one, and why? Pay attention to what comes back. Answers that lean on a deadline that only applies today, on vague praise, or on how many people buy it tend to say little about the terms. Ask them to point to the exact line in the form that supports each claim. A statement you cannot connect to a written line is a sales statement, not a contract term.
Apply the same test to this site
Use the same questions on the pages you read here. Check the methodology page to see how companies are scored and what each score is built from. Then read the published terms in the comparison tables and, where a company posts one, its sample contract, rather than trusting any summary, including ours. A ranking is only as useful as the written terms behind it, and you are the one who has to live with the contract you sign.
What to bring to the signing
Before you sign, collect the written disclosure of how each person was paid, the form with the issuer and administrator named, and the cancellation and transfer sections. If a company posts a sample contract, read that first so you can spot any difference between the sample and the form in front of you. If something was promised out loud and does not appear on paper, treat it as not promised and ask for it to be added before you sign.