United Kingdom

UK payment service provider partner program: your merchants on Shopify, your gateway behind the checkout.

The UK has a deep bench of FCA-authorised PSPs and acquirers, strong local acquiring and a mature high-risk segment. Very few of them are on Shopify's gateway list for the UK. A UK merchant on Shopify therefore ends up on Shopify Payments by default and leaves the PSP that would have served them better. This page explains how UK partners change that.

What partners get →

The UK specifics

Regulation. Partners are typically FCA-authorised payment or e-money institutions, or agents of one. We are software; the regulated activity stays with you.
Strong customer authentication. UK SCA rules mean 3-D Secure on most card transactions, with exemptions the acquirer manages. The checkout runs the 3DS redirect leg and passes the result back to your API.
Acquiring and gateways. Worldpay, Barclaycard, Elavon, Global Payments, Checkout.com, PXP and Trust Payments among acquirers; many independent gateways in front of them. Most are absent from Shopify's UK list.
Categories. CBD is legal to sell in the UK and still declined by Shopify Payments; nicotine pouches and vape products, supplements, subscription boxes and adult are the recurring cases.
Open Banking and Faster Payments. Account-to-account methods can be added as routes beside cards for merchants who want a chargeback-free rail.

What a UK partner gets

Gateway integration, once

Your API connected: authorisation, capture, refund, void, 3DS, notifications, GBP and multi-currency where you offer it.

Checkout on the merchant's domain

Branded to the merchant, single page, wallet support where your acquiring allows, orders written back into Shopify or WooCommerce.

Onboarding in your hands

A typical UK onboarding

Merchant is approved by you and holds a Shopify store on Shopify Payments, or on no card gateway at all.
Your team registers the merchant in the console and captures the gateway credentials.
The merchant points checkout.their-brand.co.uk at us; TLS is issued automatically.
A test order runs through your sandbox and lands in the merchant's Shopify as a paid order.
Live credentials swapped in; the merchant's Buy buttons switch to the new checkout.

Posture

We are not a PSP and not FCA-authorised; we do not need to be, because we never touch funds.
Card data is tokenised by your hosted fields; the merchant's store and our servers are out of scope.
Merchants disclose their category to you. We do not present them as something else.
Data processing follows UK GDPR; a data processing agreement is available on request.

Frequent questions

Can a UK PSP offer Shopify merchants its own gateway?

Yes, through a checkout on the merchant's own domain that runs your gateway and writes orders back into Shopify. Shopify's own checkout is not modified.

Does the checkout support UK SCA?

Yes. 3-D Secure runs as a redirect with the result passed to your API; exemptions are handled by your acquiring.

Can we include Open Banking payments?

Account-to-account methods can be added as routes where your provider supports them.

Is there a partner price list?

No. Terms are agreed in the partner conversation.

Bring one merchant you cannot place on Shopify today.

We walk through the connection on a call or in writing, sandbox first. Commercial terms are discussed in that conversation, not on a pricing page.

Partner program →

Partner program → · EU partners → · White-label checkout → · Onboarding platform →

CascadeCheckout is checkout software, not a payment service provider, bank or merchant-account seller. You contract with your own gateway or acquirer, disclose your real business category to them, and receive payouts from them. We never hold funds and we do not promise that any processor will approve you.