Stablecoin payments for EU merchants: MiCA, USDC and the Travel Rule

What a stablecoin checkout for EU merchants needs: MiCA and payment licences, why USDC and not USDT, Travel Rule checks on self-hosted wallets, euro settlement and refunds.

· Head of IT
· 8 min read
A teal stand with a QR code to pay in USDC, with a teal glass dollar coin, a gold euro coin and a check block

In the EU, the company that runs a stablecoin checkout needs authorisation as a crypto-asset service provider (CASP) under MiCA, the Markets in Crypto-Assets Regulation. Since 2 March 2026, holding and transferring e-money tokens such as USDC for clients can also require a payment licence, or a licensed partner. A merchant that only receives euros needs neither. The coin matters too: USDC's EU issuer is in the e-money token register of ESMA, the EU's markets regulator; USDT's issuer is not, which restricts EU services in USDT.

This guide is general information, not legal advice: the details depend on your services and your market, so confirm them with a lawyer and the regulator before you apply.

How a stablecoin checkout works

A stablecoin is a crypto-asset that keeps a steady value against a currency, usually the US dollar.

  1. The customer picks USDC and the blockchain they hold it on, such as Ethereum, Solana or Base, online or from a QR code at the till.

  2. The checkout shows the amount in USDC, at a rate held while they pay.

  3. The customer sends it from their own wallet or an exchange account.

  4. The provider running the checkout detects the payment on the blockchain, screens the paying wallet for sanctions and illicit activity, and credits the merchant, whose company and owners it verified at sign-up (know your business, or KYB).

  5. The merchant keeps the USDC or converts it at a quoted rate, and the euros reach its bank by SEPA Instant, an instant euro transfer.

Unlike card payments, blockchain payments have no chargebacks: a refund is a new transfer.

What MiCA calls the coins

MiCA, Regulation (EU) 2023/1114, sorts stablecoins in two (Article 3). An e-money token (EMT) references one official currency, as USDC references the dollar; EMTs are deemed to be electronic money. An asset-referenced token (ART) references anything else, such as a basket of currencies.

Only the issuer of an EMT, authorised as a bank or an e-money institution and with a published white paper (a disclosure document), or someone with its written consent, may offer it to the public or seek its admission to trading in the EU (Article 48). Holders can redeem it at face value at any time (Article 49). These rules have applied since 30 June 2024 (Article 149).

EMTs in a non-EU currency, like ARTs, also face a cap. If their use as payment, merchants included (recital 61), exceeds 1 million transactions and €200,000,000 a day in one currency area, on a quarterly average, the issuer must stop issuing (Articles 23 and 58(3)).

Who needs a licence

A checkout usually provides three MiCA crypto-asset services to merchants (Article 3(1), point 16):

  • custody: holding their USDC, or the keys to it;

  • transfer services: moving it on their behalf, for payouts and refunds;

  • exchange of crypto-assets for funds: buying it for euros with its own capital. Selling it through a liquidity provider instead is execution, or reception and transmission, of orders.

Each needs CASP authorisation (Article 59). A bank can notify its authority instead, but an e-money institution can notify only for custody and transfers of tokens it issues (Article 60). The MiCA checklist covers the rest. A merchant that sells its own goods provides none of these services, whether it takes euros or keeps USDC.

The payment licence

As electronic money, EMTs are also funds under the Payment Services Directive (PSD2), and MiCA lets a CASP provide payment services, such as euro payouts, only if it or a partner is authorised under PSD2 (Article 70(4)). The European Banking Authority's (EBA) No Action letter of 10 June 2025 advises authorities to treat two activities as payment services: transferring EMTs for clients, and holding them in a custodial wallet, one whose keys the provider holds, that can send to and receive from third parties. Exchanging them for funds is not one.

From 2 March 2026, the EBA's opinion of 12 February 2026 advises authorities to allow these services only with a payment or e-money licence or a licensed partner, for example as its agent; applicants may continue under strict conditions, without marketing or new clients. It holds until the planned Payment Services Regulation applies (see the EMI and payment institution guide).

Outside the EU, see the UAE and UK guides.

Why USDC, and not USDT

USDC's EU issuer, Circle Internet Financial Europe SAS, is an e-money institution authorised in France, listed in ESMA's register with its USDC white paper. USDT's issuer is not in it (update of 30 September 2026).

Under Article 48, that means nobody may offer USDT to the public or seek its admission to trading in the EU. The European Commission's answer of 17 January 2025 adds that CASP services can do either: a trading platform listing the token seeks its admission, and exchange, order or execution services that promote or advertise it can be making an offer, judged case by case. Such services have been prohibited since 30 June 2024. ESMA's statement of the same day expected compliance by the end of March 2025 at the latest:

  • trading platforms stop listing these tokens;

  • exchange, order and execution services that amount to an offer stop, with existing ones restricted by the end of January 2025;

  • sell-only services, so holders could get out, were allowed until the end of March 2025.

ESMA added that mere custody and transfer should remain possible. But a checkout that advertises USDT to EU customers and converts it into euros runs into the case-by-case test, and on 30 September 2026 ESMA asked the Commission to amend MiCA so that a CASP may provide no service that needs a MiCA licence in such tokens: a proposal, not yet law.

The Travel Rule and self-hosted wallets

Since 30 December 2024, Regulation (EU) 2023/1113 has made crypto-asset transfers carry details of the sender and the recipient: the Travel Rule (Article 14). When a customer pays from an exchange account, the exchange sends the details; if any are missing, the checkout rejects or returns the payment, or asks for them before crediting (Article 17).

Many customers pay from a self-hosted wallet, an address not linked to any provider (Article 3). Then the checkout must (Article 16(2)):

  • obtain and hold the payer's name and the other details Article 14 lists, and keep each transfer individually identifiable;

  • above €1,000, take adequate measures to assess whether the merchant, as recipient, owns or controls the paying address.

The EBA's Travel Rule Guidelines add that the details come from the provider's customer, here the merchant, which knows the buyer from the order, and that the €1,000 test uses the euro value on receipt. A buyer's wallet is not the merchant's; the guidelines then accept verifying the buyer with reliable, independent data, such as blockchain analytics.

Settling in euros, refunds and the books

Settlement. Until conversion, someone carries the exchange-rate risk: the provider, if it guarantees the euro amount, or the merchant, if credited in USDC. Euros held for merchants go into a separate account at a bank or central bank by the end of the next business day, unless the provider is itself a bank, payment or e-money institution (Article 70).

Refunds. When a consumer withdraws from an online purchase, the merchant must refund within 14 days of being told, by the same means of payment unless the consumer expressly agrees otherwise and pays no fees as a result (Consumer Rights Directive, Article 13). So plan USDC refunds, with the merchant's terms saying whether the coins or the euro price go back, and who pays the network fee. The Travel Rule applies on the way out too (Article 14(5)).

The books. Record each payment's coin, network, transaction hash (its ID on the blockchain), rate and fee against its order. A merchant keeping USDC holds a dollar crypto-asset its accountant must classify. Neither provider nor issuer may reward merchants for holding USDC: MiCA treats that as interest, and bans it (Article 50).

Decisions that shape the build

  • Networks. Each has its own addresses, confirmation times and fees.

  • Conversion. Converting at once keeps merchants in euros; holding suits those with dollar costs.

  • Licences. Your own, or a partner's while you apply.

  • Custody. A custody provider, or your own keys.

  • Payer data. What the merchant passes on, and what the checkout asks.

For paying suppliers abroad, see B2B stablecoin payments.

What drives the cost

  • The authorisations, or partner agreements at first.

  • Custody, and access to each network.

  • Liquidity for conversion, and a bank for euros.

  • Wallet screening, Travel Rule messaging and transaction monitoring.

  • Network fees on payouts and refunds.

  • Compliance staff and support.

Common mistakes

  • USDT for EU customers by default. Get a legal view, and follow the MiCA review.

  • Stopping at the MiCA licence. Holding and moving EMTs can need a payment licence too.

  • Relying on an e-money licence. By notification, it covers custody and transfers only of tokens you issue.

  • Crediting before the checks. Screening and Travel Rule data come first.

  • Refunds as an afterthought. Without chargebacks, the refund flow is yours to build.

What this means for your platform

Our white-label stablecoin checkout ships with merchant onboarding and KYB; a hosted checkout, payment links, an API and QR codes, priced in euros with the rate held; wallet screening with Chainalysis, Elliptic or TRM Labs before each credit; Travel Rule messaging through Notabene, Sygna, 21 Analytics or TRP; USDC and euro balances in one ledger; and SEPA Instant payouts. Its demo shows only USDC because its merchant is in the EU, where USDT's issuer is not authorised under MiCA; the checkout also takes USDT where your licence allows. It goes live in about 30 days, handed over with its full source code. We help you get the custody, liquidity and banking contracts, and configure it to your licences or a partner's. The same modules assemble anything else you need, from shop plugins to split settlement for marketplaces, in 2 to 3 months.

Sources

Checked on 7 October 2026.

Written by

Paynoramic's Head of IT

Head of IT

Head of IT at Paynoramic, responsible for the module library every platform is built from. Has worked on payment, banking and workforce platforms for companies including American Express, Teya and Indeed Flex, and for a global card issuer-processor. Writes about what a fintech or crypto launch needs beyond the software: licensing, certification and the real cost.

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