The federal cousin of the waiver has its own definition. For national banks, the same arrangement is a debt cancellation contract, which 12 CFR 37.2(f) defines as a contractual arrangement modifying the terms of a loan under which "a bank agrees to cancel all or part of a customer's obligation to repay an extension of credit from that bank upon the occurrence of a specified event." Federal credit unions operate under a parallel rule at 12 CFR part 721. Virginia's act, continuing as the example, does both halves of the sorting explicitly: it provides that GAP waivers governed by it "are not insurance and are exempt from the insurance laws of the Commonwealth" (section 38.2-6406), and it excludes from its own scope a debt cancellation contract offered in compliance with 12 CFR part 37 or part 721 (section 38.2-6407). So the practical question for a buyer is which of three regimes wrote the rules for the piece of paper they signed: a state insurance department, a state GAP waiver statute, or a federal banking regulator. That answer decides who takes a complaint and which refund rules apply.
Regulation Z treats all of them identically for the one purpose that shows up in the price. 12 CFR 1026.4(d)(3) allows charges "for debt cancellation coverage for amounts exceeding the value of the collateral securing the obligation" to be excluded from the finance charge, "whether or not the coverage is insurance", and that description is GAP written in regulatory language. The exclusion is conditional. The coverage must not be required by the creditor and that fact must be disclosed in writing, the fee for the initial term must be disclosed in writing, and the consumer must sign or initial an affirmative written request for it after receiving those disclosures. Miss any of those and the charge is a finance charge, which lifts the disclosed annual percentage rate above the interest rate on the note. The CFPB puts the consumer-facing version plainly: if you are told you must buy GAP to qualify for financing, ask where the sales contract says so, because "if it is true, the cost of the GAP insurance must be included in the finance charge and reflected in the disclosed annual percentage rate (APR)." For national banks there is a further rule in the same direction: 12 CFR 37.3(a) prohibits a bank from extending credit, or altering its terms, on condition that the customer enter into a debt cancellation contract.
The refund is the most commonly forfeited part of the product. GAP is priced for the whole term of the loan, so ending the loan early leaves part of the fee unearned. Where a national bank wrote the contract, 12 CFR 37.4 requires the bank to refund unearned fees on termination, expressly including termination by prepayment, unless the contract says otherwise, and a bank may only offer a no-refund contract if it also offers the same customer a bona fide option to buy a comparable contract that does provide a refund. The refund must be computed by a method at least as favorable to the customer as the actuarial method. The CFPB's guidance for buyers is the same in substance: you may be entitled to a refund if you sell, refinance, or prepay the loan. Because none of this happens automatically at most lenders, a payoff, a trade, a refinance and a total loss are all moments to go looking for the paperwork.
The premise, stated once, because it is what the product is for. A vehicle usually loses value faster than an amortizing loan reduces its balance, so there is a stretch early in the loan during which the balance exceeds the vehicle's value. GAP is worth its price only inside that stretch and is a poor purchase outside it. Published material on auto loans works that arithmetic and the variables that lengthen the stretch, chiefly a long term and a small down payment, and this page does not repeat it.
How it is sold is part of what a buyer needs to know. GAP reaches most buyers at the finance desk of a dealership, in the same conversation as extended warranties, credit insurance and paint protection, and where the fee is financed it is paid for with interest over the life of the loan rather than in cash. The CFPB notes that eligibility restrictions are common and that pricing varies widely for what is nominally the same protection, and that an existing auto insurer or a direct lender may sell the same protection separately. Adding optional products into the financed amount is a practice regulators name in its own right, and its cost is easy to underestimate because it never appears as a separate bill.