Buying Tradelines: Is Credit Piggybacking Legal, and Does It Work?

What 'Buying a Tradeline' Means

A tradeline is simply an account as it appears on your credit report. Buying one means paying a broker a few hundred to a few thousand dollars to be added as an authorized user on a stranger's aged, high-limit, perfectly-paid credit card. You never get the card and never use it — the point is that the account's history copies onto your report for a cycle or two. The practice is called piggybacking.

Being an authorized user itself is ordinary and legitimate: parents add teenagers, spouses add partners, and the Consumer Financial Protection Bureau confirms an authorized user is not liable for the balance. The question is what changes when the relationship is a payment to a stranger.

Is It Legal? The Honest Answer

No federal statute names the purchase of an authorized-user tradeline and bans it outright. That is the sentence sellers quote. What they leave out is that the FTC has never blessed the practice, and it has sued the companies that sell it.

In March 2020 the FTC sued BoostMyScore and its CEO over piggybacking sales priced from $325 to more than $4,000, alleging violations of the FTC Act, the Credit Repair Organizations Act, and the Telemarketing Sales Rule. The marketing promised a stranger's credit "copied and pasted" onto your report and "the biggest possible FICO score boost in less than 60 days; and it's guaranteed." Guarantees like that, plus fees collected before services were performed, are what CROA prohibits — regardless of whether the tradeline itself is lawful.

Where the Real Legal Risk Starts

The danger is rarely the tradeline in isolation. It is what surrounds it. A bought tradeline paired with a CPN or a stolen Social Security number is no longer a gray area — that is synthetic identity fraud, and it is prosecuted. Our [[/learn/cpn-credit-privacy-number-scam|CPN guide]] covers why those two products are so often sold together.

The second risk is the application. If you use an inflated score to obtain a mortgage or a loan you would not otherwise qualify for, and the file misrepresents your actual credit relationship, you are the one who signed. Federal false-statement and bank-fraud statutes carry severe penalties. The seller is not on the form.

Why It Often Does Not Even Work

Scoring models have adapted. FICO's more recent versions discount authorized-user accounts that show no relationship to the rest of the file, and lenders have their own screens. Mortgage underwriting guidance directs manual underwriters to consider whether an authorized-user account genuinely reflects the borrower's willingness and ability to repay, which is exactly what a rented line does not demonstrate.

There are mechanical failure points too: the line may post to one bureau and not the others, the issuer can remove authorized users or close the account when it detects rental activity, and the history disappears from your report as soon as the rental period ends. You are paying for a temporary number, not a credit history.

The Privacy Problem Nobody Advertises

To add you as an authorized user, the broker needs your full legal name, date of birth, address, and Social Security number — handed to an unlicensed intermediary with no fiduciary duty to you and, often, no verifiable business identity. Many of these brokers also sell CPNs, meaning they already operate in stolen-identity markets.

Weigh that against the benefit: a score bump that lasts one or two statement cycles, on a file that still looks thin underneath.

What to Do Instead

If someone who actually knows you is willing to add you as an authorized user on a well-managed card, that costs nothing and carries none of these problems. Beyond that, the levers that build a durable file are a secured card or credit-builder loan reported to all three bureaus, utilization kept low, and on-time payments over time.

And before paying anyone to move your score, confirm the score is being dragged down by something accurate in the first place. Errors are common, and correcting them is free — start with [[/learn/credit-report-errors|what to check first]], then the [[/learn/how-to-dispute-credit-report-error|dispute walkthrough]]. For what paid firms can and cannot do, see [[/learn/do-credit-repair-companies-work|do credit repair companies work?]]

Frequently asked questions