I said I’d cosign an auto loan for my parents and gave them all my details for the paperwork — but then they went to the dealer without me and got completely ripped off. What happens now?

Yo-Yo Financing

Your parents may have been duped by “yo-yo financing” — a technique underhanded salespeople use to hook people into costly car loans.

It starts as something that appears to be win-win: spot delivery. As Capital One explains, spot delivery plays to would-be buyers’ desire for immediate gratification, as a dealer lets customers leave the lot with a new car before financing is actually finalized.

That’s when the allure of spot delivery can turn into the less savoury ‘yo-yo financing,’ a kind of bait-and-switch.

The seller gives buyers the impression that loan terms are set, and lets them drive off. Then the seller contacts the buyers later saying they tried to finalize the loan at the quoted rate and couldn’t — so the finalized loan comes with a higher rate.

If the buyers can’t afford the rate, they have to return the car or risk having it repossessed or reported as stolen. Or they may think they have to take a loan they might not be able to afford.

What many buyers don’t realize in these ‘yo-yo financing’ cases is that they are not obligated to uphold any loan terms the dealer imposes.

The deal isn't actually finalized. If all parties — including an unsigned cosigner — can’t agree to the terms, the dealer must either rewrite the deal or unwind it completely and take the car back.

But you’re still exposed to some risks as a cosigner, even an unsigned one.

Stop overpaying for car insurance—seriously

Loyalty doesn’t pay—but shopping around does. In just 2 minutes, OfficialCarInsurance.com finds your lowest rate from GEICO, Allstate, Progressive & more. No calls, no fluff—just real quotes as low as $29/month. Why wait? You’re 2 minutes away from saving hundreds.

Find low rates now

The legal responsibilities and risks of being a cosigner

In this situation, you would be a "ghost" cosigner. Whether you sign or not, having your name as a co-signer on a loan comes with several risks, including:

Identity and credit exposure. Even without a signature, the dealer has a cosigner’s full name, address, license number, and likely their Social Security number. That’s enough to run a hard inquiry and open an auto‑loan application in their name. A single hard pull can shave a few points off your credit score, while a loan that actually goes through — and later defaults — can torch it for years. 

Liability if the dealer “pushes it through.” Submitting forged or “ghost” signatures is illegal, but it happens. If the lender funds the contract before the fraud is caught, the cosigner becomes jointly liable for the entire balance. Federal law requires lenders to give cosigners a special notice describing that liability, but many don’t see it until the first bill arrives. 

No automatic right to return the car. There is no federal cooling‑off period for buying a vehicle. Once financing is approved and contracts are executed, the sale is final unless the dealer offers a written return policy or state law allows a cancellation window. Most do not. 

No automatic right to use the car. Cosigners share the debt but not the keys. Unless the contract spells out ownership or usage rights, you’re on the hook for payments without any legal claim to drive the vehicle. That also means if the other party defaults on the loan, you can't just take the car back and use it yourself, unless the contract gives you that permission.

Big picture: Cosigning ties your credit and cash flow to a car you may never touch — often a lopsided deal at best. That is why it's important to know what you're getting into.

How to avoid becoming a co-signer on a risky deal

Avoid cosigning unless you trust the person implicitly or are financially able to take over the terms of the loan.

If you do decide to co-sign on a car loan, here's how to protect yourself:

• Set ground rules in writing. Agree on the maximum purchase price, loan term, and add‑ons before sharing your personal info and make it clear that you must review every document before signing.
• Never text or email your license image. A photo is enough for a lender pull. Hand it over only when you’re physically present to sign.
• Consider getting lender preapproval. Walking in with a credit-union-approved deal forces the dealer to beat or match a firm offer and eliminates spot‑delivery surprises.
• Stay for the entire financing process. Finance offices move fast; being in the chair lets you refuse extras like extended warranties, service contracts, or nitrogen‑filled tires that inflate the price.
• Read (and keep) the Truth‑in‑Lending disclosures. As the Consumer Financial Protection Bureau explains, the federal Truth in Lending Act, or TILA, requires dealers to provide you with a full TILA disclosure outlining APR, total finance charges, amount financed, and payment schedule before you sign anything. 
• Know when to say no. Cosigning can help loved ones, but you shoulder equal liability for late payments, repossession costs, and deficiency balances. If you can’t comfortably afford to make the payments, walk away. 

Being a cosigner is more than a formality; it’s a threat to your credit, wallet and relationships.

Next time, keep the paperwork — and the keys — on hold until every T is crossed and every I is dotted.