Tangem wallets do turn up on Trade Me and Facebook Marketplace, sometimes in a sealed box and sometimes as a single loose card. They are usually cheaper than new, and the question is whether that saving is worth the risk.
Our general answer is to buy new. But a second-hand Tangem wallet isn’t automatically a write-off, and if you’ve already bought one there’s a proper way to set it up safely. Here’s how to check one, and how to make it yours.
What a seller could have done to the card
The real risk with a second-hand hardware wallet is that someone else knows the key. A Tangem card holds its private key on the chip, and that key is created the first time the wallet is set up. Whoever set it up, and whoever holds the other cards from that set, has the same wallet you do.
Tangem has warned about sellers on third-party marketplaces who activate wallets before selling them. Tangem doesn’t sell devices with pre-generated private keys or access codes, and a genuine wallet never comes with an “initialization password”. If a listing or a note in the box gives you a code to use, the seller has been there first.
The other risks are more ordinary:
- a lookalike card, or a Tangem production sample or developer card that was never meant for sale
- one card from a two- or three-card set, with the seller keeping the rest
- an access code the seller has forgotten or won’t hand over
- a seller who takes the money and never posts anything
What the Tangem app checks when you scan
A Tangem card is easier to check than most wallets. Each chip has its own key pair registered with Tangem, and the official app checks the card’s identity and its firmware every time you tap it, using a certificate it downloads on the first scan. The firmware can’t be changed after manufacture, so a seller can’t load modified software onto a genuine card.
The first scan tells you most of what you need. Tangem’s help centre lists three outcomes:
| What the app shows | What it means | What to do |
|---|---|---|
| Create wallet screen | Genuine card, never activated | Safe to set up |
| Wallet already activated | The card has been used before | Don’t use the existing wallet. Reset the card and create a new one |
| Authenticity check failed | Not a standard consumer card (a sample, a developer card or a counterfeit) | Don’t create a wallet. Contact Tangem support |
If a card already holds a wallet, the app asks if this is your first activation and warns that being asked to enter or change an access code on first use is a scam. Take that warning at face value. Never use an access code that came from the seller.
Do the first scan with your phone online, because that’s when the app downloads the card’s certificate. Use the Tangem app from the App Store or Google Play, installed by you, never an app or link the seller sends. Our guide to phishing and fake wallet apps explains why.
What Tangem says, and what we recommend
Tangem itself is relaxed about where you buy. This is directly from Tangem’s help centre:
“The Tangem app verifies the authenticity of both the chip and the firmware, providing adequate protection against counterfeiting. Thanks to this technology, it is entirely safe to buy anywhere.”
That is Tangem’s official position, and no vulnerability has been found that contradicts it. We at Tangem NZ still recommend buying a new wallet. A new set has never been in anyone else’s hands, it arrives with every card in the set, and buying from a New Zealand business gives you Consumer Guarantees Act cover. When a wallet will hold money you can’t afford to lose, we’d rather remove the question entirely than rely on a check passing.
A reset fixes the key problem, if you can do it
Tangem’s advice for a card that’s already activated is short: don’t use the existing wallet, reset the device to factory settings, and create a new wallet. A reset erases the old keys completely. When you create the new wallet, the chip generates fresh keys that the previous owner has never seen.
The catch is the access code. The reset steps ask for the card’s access code before the app will erase anything. If the seller can’t or won’t tell you the code, you can’t reset the card, and Tangem’s own reset guide says a card whose code is forgotten, with no other way to recover it, becomes useless.
Getting past a forgotten code needs two cards from the original set, one of them with access code recovery turned on. Our post on recovering a seedless wallet walks through it. A lone card with no code and no siblings can’t be recovered that way.
So before you pay, ask the seller to reset every card in the set in front of you, or to give you the code so you can do it yourself on the spot.
Missing cards and your backup
A Tangem wallet is normally two or three cards that share one key, and any of them opens the wallet. Backup cards can only be added when a wallet is created, and only an empty card can become a backup. Our backup cards explainer has the detail.
If you buy one card from a set and keep using the old wallet, the seller still holds a working key in another card. If you reset that single card instead, you start a fresh wallet with no backup device, unless you use the optional seed phrase. Tangem cards work without one, but you can choose to create one at setup.
Count the cards. If the listing shows fewer than the box says, or the seller is vague about where the others went, assume someone else has them. A genuine box holds two or three devices, a getting started leaflet and a specifications sheet.
No Consumer Guarantees Act on a private sale
Buy from a private seller and you lose most of your consumer protection. Consumer Protection says private sales aren’t covered by the Consumer Guarantees Act or the Fair Trading Act. A card that turns out to be a developer sample, or one with no usable access code, is your problem.
Buying second-hand from a New Zealand online business is different. Consumer Protection says your rights are the same as buying new, though you shouldn’t expect the same quality.
For a private purchase, get the seller’s full name, phone number and address, plus a receipt that records what they told you about the item. You’ll need all of it if the dispute ends up at the Disputes Tribunal.
Overseas sellers and marketplace listings
Tangem says many of the pre-activated listings it has seen come from sellers in Asia, with the same scam turning up in Europe, the Americas and elsewhere. Distance makes every check harder: you can’t scan the card before paying, and a return can cost more than the card.
Tangem names its official sales channels as tangem.com, its official Amazon store and its authorised resellers. We’re an authorised reseller in New Zealand. A cheap storefront using Tangem’s product photos is not on that list. Our guide to buying Tangem safely in NZ covers the channels we get asked about most.
Walk away if you see any of these:
- an access code, PIN or “initialization password” supplied with the card
- a box that’s open or resealed, or missing its leaflet and specifications sheet
- payment by crypto or gift card only, with no option to meet
- a seller who sends you their own app link or setup guide
- a seller who won’t let you scan the cards before you pay
Checking a second-hand Tangem card, step by step
- Install the Tangem app yourself from the App Store or Google Play.
- Meet the seller if you can, and scan every card with your phone online before any money changes hands.
- If any card fails the authenticity check, don’t buy the set.
- If a card shows an existing wallet, have the seller reset every card in the set while you watch. Scan again: each should now show the Create wallet screen.
- Create your new wallet with all the cards you plan to keep in one go, because backups can’t be added later.
- Send a small amount first and confirm it arrives before moving anything larger.
If the card will hold a large amount, our usual advice applies to second-hand cards too: set it up with a seed phrase written on paper or metal and locked away securely, apart from the cards. Never photograph it or keep it on a phone, email or cloud drive.
When new is the better buy
A new Tangem 2-card set is NZ$109.99 from us, including GST. Weigh any second-hand discount against that, and against what you plan to keep on the card.
New gets you a sealed box, cards nobody has activated, Consumer Guarantees Act cover and Tangem’s 25-year warranty. If you’ve already bought one second-hand and something looks wrong, Tangem’s advice is to report the seller to the marketplace, contact Tangem support with photos and where you bought it, and raise it with your payment provider.
FAQs
Buy genuine Tangem wallets from Tangem NZ, an authorised New Zealand seller shipping from Auckland, with NZ$ prices including GST. Every set arrives sealed, so the first key on the card is the one you create.
