Yes — they’re legal. I get some version of this question from almost everyone who finds this site for the first time. They’ve heard the pitch, done some Googling, and they’re not sure if authorized user tradelines are a legitimate thing or some gray-market scheme about to blow up in their face. Short answer: legal. Longer answer below.
What the law actually says
Authorized user accounts have been a normal part of the credit system for decades. There’s no law against being added as an authorized user on someone else’s credit card, and no law against a cardholder being paid to add you. The Fair Credit Reporting Act explicitly allows third-party accounts — accounts opened by someone else — to appear on your credit report. That’s the legal foundation the whole industry rests on.
The Federal Trade Commission has looked at the tradeline industry and hasn’t moved to ban it. Credit scoring models have adjusted over the years — FICO 8 and later versions are less credulous about authorized user accounts than older models were — but that’s a scoring methodology change, not a legal one. Nothing about the practice has been declared illegal.
Where the confusion comes from
Most of the “is this legal?” concern comes from people confusing authorized user tradelines with CPNs — Credit Privacy Numbers. CPNs are not legal. They’re a synthetic identity fraud scheme: you’re assigned a fake nine-digit number and told to use it in place of your Social Security number on credit applications. That’s federal fraud, and people go to prison for it.
Authorized user tradelines are the opposite of that. You’re using your real identity, your real Social Security number, and a legitimately opened credit account. The only thing being “gamed” is the scoring model’s imperfect treatment of authorized user accounts — and that’s not something you can be arrested for. If anyone is selling you a “new credit identity” alongside a tradeline package, walk away from that entire situation.
The real risks (they’re not legal ones)
The actual risk in tradelines isn’t legal exposure — it’s issuer behavior. Credit card companies can close accounts whenever they want, for any reason, and some issuers are more aggressive about flagging tradeline activity than others.
Bank of America is the one I’d call out by name. I had a $40,000 BoA card closed on me — no warning, just gone — because they suspected tradeline activity. That’s entirely within their rights, and it still stung. For buyers, a BoA card closure means the tradeline might not post, or might post and then get reversed. Not illegal, just a bad outcome.
Citi is worth mentioning separately: they have a reputation for missing authorized user postings altogether. (This is specific to Citi — other major issuers don’t have this problem at the same rate in my experience.) You can be added, the statement can close, and the account just doesn’t show up on the buyer’s report. If you’re buying a tradeline, it’s worth asking the seller which issuer the card is with before committing.
The misconception about authorized users and spending
One thing I want to clear up because I’ve seen it repeated online: in the tradeline-selling context, buyers don’t receive a physical card. They don’t have access to the account. They’re added as an authorized user on paper — the credit history posts to their report, and that’s where the relationship ends. I’m not mailing anyone a way to spend on my accounts.
The scenario people imagine — an authorized user racking up charges and leaving the primary cardholder holding the bill — applies when you add a family member or partner who physically has the card in their wallet. That’s a real thing that happens in personal finance. In the tradeline-selling context, there’s no card, no access, and no spending. The risk profile is completely different.
The Amex quirk buyers often miss
One more thing worth knowing before you buy: American Express tradelines tend to underperform, and most buyers don’t find out why until after the fact. Since around 2015, Amex reports authorized users with the date the AU was added as the account open date — not the card’s original open date. (This was a deliberate policy change on Amex’s part, and it applies to all AU additions, not just tradeline ones.)
So a 12-year-old Amex card adds you today? Your credit report shows a one-day-old account. That wipes out the age benefit entirely — which is usually the main thing a buyer is paying for. Chase, Capital One, Bank of America, and most other major issuers still report the original open date for AUs. If age is the driver for your purchase, stick with non-Amex cards.
Want to buy a tradeline?
If you’ve done your homework and you’re ready to move forward, I sell authorized user tradelines directly on this site. Buying direct skips the broker layer, so prices are lower than going through a middleman. There’s also a FAQ and a price comparison chart if you want to see how things stack up. Questions welcome before you commit.
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