Foreign Card Topped Up With Crypto — How It Works
A crypto-funded card converts your coins to fiat so you can pay abroad. Learn how it works, which fees to check, and join the Matrimix card waitlist.
A foreign card topped up with crypto is a prepaid or virtual payment card: you send coins, they are converted into fiat, and you spend the balance anywhere the card network is accepted. The Matrimix card for paying abroad is in preparation — you can join the waitlist on /cards.
How crypto-funded cards work
Most cards of this type follow the same pattern:
- You open an account with the card provider and pass its checks.
- You top up with crypto. Usually stablecoins such as USDT or USDC, sometimes BTC, ETH or other coins.
- The provider converts the coins into fiat — at top-up time or at the moment of payment.
- You pay with the card online, in shops, or via a mobile wallet if the card supports it.
The card itself works with ordinary fiat. The merchant does not see crypto; it sees a regular card payment in dollars, euros or another currency.
Prepaid vs virtual
- Prepaid physical cards are delivered by post and work at terminals and ATMs.
- Virtual cards are issued instantly and are used for online payments and subscriptions, sometimes added to a phone wallet.
Fees to look for
A crypto-funded card can be cheap or expensive depending on the details. Before you choose one, check every line:
| Fee | What it is | What to check |
|---|---|---|
| Issue fee | One-time cost of opening the card | Is it charged for virtual and physical cards alike? |
| Top-up fee | Charged when you load crypto | Percentage or fixed amount, plus the network fee |
| Conversion spread | Difference between the market rate and the rate you get | Is the rate shown before you confirm? |
| Foreign currency fee | Paying in a currency other than the card's | Is there an extra markup? |
| ATM fee | Cash withdrawals | Fixed fee, percentage, monthly limits |
| Monthly fee | Account maintenance | Charged even when the card is not used? |
The network fee for sending coins depends on the blockchain. USDT on TRC20, TON or Solana is often cheaper to move than on ERC20, but always use the network the provider asks for — a wrong network can mean lost funds.
KYC at card issuers
Payment cards are issued by regulated companies, so card providers in general ask for identity verification: a document, a selfie, sometimes proof of address. Limits often depend on the level of verification. This is different from a non-custodial swap, where you only enter an address.
Be wary of services that promise a card "without any checks" from an unknown issuer. Such cards can be blocked at any moment, together with the balance on them.
Risks to keep in mind
- Custody. The balance on a card is held by the provider, not by you. Keep only what you plan to spend.
- Frozen funds. A provider can block a card after a risk review, just like a custodial exchange can freeze coins.
- Exchange-rate movement. If conversion happens at the moment of payment, the amount in crypto can change.
- Irreversible top-ups. A crypto transaction cannot be reversed; check the address and network.
- Local rules. Card availability and permitted use depend on your country and the issuer's terms.
The Matrimix card: in preparation
Matrimix is preparing a card for paying abroad that you will top up with crypto from the Matrimix wallet. It is not live yet. Join the waitlist on /cards to get notified when it launches; terms and fees will be published before launch.
Until then, you can keep stablecoins in the wallet — deposit addresses are available for USDT on TRC20, TON, Solana, ERC20 and BEP20, and USDC on Solana and ERC20 — and move them between Matrimix users by Matrimix ID instantly and for free. Withdrawal fees are shown before you confirm; see fees.
FAQ
Is the Matrimix card available now?
No. It is in preparation. You can join the waitlist on the Cards page and we will let you know when it launches.
Which coins are best for topping up a card?
Stablecoins such as USDT or USDC are the most common, because their value does not swing like BTC or ETH. Use the network the card provider supports.
Do crypto-funded cards require identity verification?
In general, yes. Cards are issued by regulated companies, and most of them verify identity before issuing a card or raising limits.