Who is the merchant?
Ownership of funds, refunds, disputes and invoices determines whether you need direct payments, subscriptions or marketplace architecture.
UK implementation guides
UK payments and ecommerce
Checkout is a chain of money, tax, fulfilment and evidence—not a payment button. This cluster helps UK retailers, marketplaces and subscription businesses decide where platform defaults end and custom operational logic begins.
- 3
- published guides
- UK
- market-specific
- source
- linked at each claim
- 2015
- shipping since
Decision overview
Start with the business decision.
Architecture and operations for UK payments, ecommerce, tax, shipping and cross-border sales, grounded in production implementation choices.
What must reconcile?
Model the order, payment, tax, refund and fulfilment states as separate records joined by durable provider identifiers.
Where can fulfilment fail?
A paid order is not a shipped order. Carriers, stock, address quality and asynchronous webhooks need observable recovery paths.
Which border is crossed?
UK-only, Northern Ireland, EU and worldwide sales have different tax, customs, payment and customer-experience requirements.
Working principles
Controls that travel between projects.
- 01Make every money-moving webhook idempotent.
- 02Reconcile provider events against an internal ledger.
- 03Keep address, tax and fulfilment failures recoverable after payment.
- 04Confirm regulatory and tax positions with qualified advisers.
Published guidance
Implementation detail, with the boundary shown.
Each guide states what the cited source supports, what still needs product or professional judgement, and how the integration fails in practice.
Payments
Stripe webhooks end to end
A production pattern for signatures, idempotency, retries, event ordering and reconciliation.
Read the guide →TicketingWhen custom ticketing beats platform fees
The ownership, payment and operational trade-offs behind a UK event platform build.
Read the guide →MarketplaceAnatomy of a B2B marketplace MVP
The features and operational decisions that dominate a wholesale marketplace budget.
Read the guide →These pages provide technical and operational guidance, not legal, tax, financial or compliance advice. Confirm regulated decisions with an appropriately qualified UK adviser.
Explore all UK insight clusters →