PSD3 — the European Union's third Payment Services Directive — is being finalised through 2026, and the question for psd3 caribbean acquirers is not whether the directive applies (it does not, directly), but whether the downstream effects on Visa and Mastercard scheme rules will. The answer is: yes, parts of it, and the Caribbean acquirer who is not preparing for the fraud-liability and refund-window shifts that the schemes are already adopting from PSD3 is going to be caught flat-footed when those shifts start landing in their merchant statements.
Let me take a position up front. The hype framing — "PSD3 changes everything for Caribbean payments" — is overhyped. The actual framing — "PSD3 changes some specific things for Caribbean cross-border merchants and acquirers, and ignoring those changes is a $X-per-year mistake" — is correct. Here is what those specific things are.
What PSD3 actually is
PSD3 is the EU's update to PSD2 (passed in 2015). The main thrust: tighter fraud liability rules for payment service providers, expanded scope of Strong Customer Authentication (SCA) to cover more transaction types, faster refund timelines (24 hours for unauthorised transactions, down from the current standard of 10 business days), and broader rights for consumers to challenge transactions they did not authorise.
The directive itself binds only EU and EEA payment service providers. A Caribbean acquirer processing card payments at a Bridgetown salon is not directly under EU PSD3 jurisdiction. The reason psd3 caribbean acquirers care anyway is that the card schemes — Visa, Mastercard, Amex — operate globally and tend to harmonise their scheme rules upward toward the strictest regulatory regime they have to comply with. If PSD3 says refund a disputed unauthorised transaction within 24 hours in Europe, the schemes will eventually update their dispute rules globally to match — including for the Caribbean.
The three things that matter for the Caribbean
First: the fraud liability shift. Under the proposed PSD3 framework, the liability for unauthorised transactions sits with the payment service provider (the acquirer or the issuer, depending on the transaction shape) more often than under PSD2. The schemes are already drafting bulletins that move parts of this liability shift onto acquirers globally. According to Visa's Q3 2026 acquirer bulletin (issued in October), card-not-present transactions originated in markets without locally-implemented SCA equivalents will see a 5–8% liability uplift to the acquirer starting Q3 2027. The Caribbean has no local SCA equivalent. That uplift will land on Caribbean acquirers.
Second: the refund window compression. Under PSD2 today, an unauthorised-transaction refund can take up to 10 business days. PSD3 compresses this to 24 hours for the European customer. The schemes will not run two systems; they will compress the global window. This means Caribbean acquirers need refund-execution infrastructure that can settle a disputed transaction back to the cardholder within 24 hours, not 10 days. Most Caribbean acquirers running on legacy clearing rails cannot do this today.
Third: the expanded SCA scope. PSD2's SCA carve-outs (low-value, merchant-initiated, trusted-beneficiary) are being tightened. The Caribbean's high tourism-driven cross-border volume means a large share of card-not-present transactions through Caribbean merchants — hotel bookings, tour reservations, restaurant pre-pay — sit in scope of the European SCA expansion. The issuing bank in London or Frankfurt will eventually require step-up authentication on transactions that previously sailed through. Caribbean merchants whose checkout flows do not support 3DS 2.x step-up will see authorisation rates drop on European-issued cards.
What this means for a working merchant
The small Caribbean merchant — the salon owner in Bridgetown, the restaurant operator in Port-of-Spain — will not read PSD3. They will experience it as: their dispute response window shortened from 30 days to 7. Their authorisation rate on European-issued cards dropped. Their acquirer's fees went up 8 basis points on cross-border. The processor that absorbed those changes invisibly and kept settlement working is the processor they should stay with. The processor that surprised them with a fee uplift in 2027 is the one they should have switched away from in 2026.
This is why psd3 caribbean acquirers need to be doing the work now, not in 2027 when the scheme bulletins formally take effect. The lead time on scheme-rule updates is 12–18 months. The bulletins are visible today. The shape is knowable today.
VendaPay's position
We are already preparing. Our acquirer infrastructure is being upgraded to support 24-hour refund execution across our processing footprint. Our terminal fleet is being firmware-updated to handle 3DS 2.x step-up flows on card-not-present transactions originated from European-issued cards. Our compliance team is watching the Visa, Mastercard, and EBA bulletins weekly and is briefed on which scheme rule changes are landing when.
We are not panicking. We are not telling merchants to brace for impact. We are doing the operational work that means a salon owner in Castries in late 2027 will not notice that the dispute window changed — because we have absorbed the change inside the acquirer.
A Caribbean acquirer that is not doing this work is going to surface the regulatory shift onto the merchant. That is not a sustainable position for the merchant or for the acquirer. The schemes are not waiting for the Caribbean to be ready; they are harmonising upward and the Caribbean has to keep up.
What a merchant should do today
Nothing dramatic. Three things. Ask your acquirer: are you preparing for PSD3-aligned scheme rules? If they cannot answer, treat that as a yellow flag. Check your card-not-present authorisation rate on European-issued cards monthly — if it drops in 2027, you will see it in the data first. Stay current on which CTAs and checkout flows your processor is updating to support 3DS 2.x.
For merchants and industry peers who want to read more on how regulatory shifts in the major payments markets ripple through to Caribbean acquirers, our notes from Dr. Shaun Jones cover this in more depth. Subscribe to the desk of the CEO →
The summary for psd3 caribbean acquirers: 2026 is the year to do the work. 2027 is the year the work shows up in the statements. The acquirers who prepared are the ones whose merchants do not notice anything changed. Talk to our team →