E-Commerce Security Regulations for UK Retailers: What Online Retailers Must Have
UK online retailers face a more complex regulatory landscape than their physical counterparts. Payment processing creates PCI DSS obligations. Customer data creates UK GDPR obligations. Cookie banners and tracking create PECR obligations. Buy-now-pay-later integration creates FCA scrutiny. And as e-commerce fraud has grown, new regulations around digital identity verification and strong customer authentication (SCA) under PSD2 have added additional technical requirements. Understanding which obligations apply to your platform is the starting point for building a compliant e-commerce security programme.
E-commerce fraud costs UK retailers over £1.5 billion annually — and SCA (Strong Customer Authentication) compliance under PSD2 is now mandatory for all online transactions.
Strong Customer Authentication and SCA for E-Commerce
Strong Customer Authentication (SCA) under PSD2 / the UK's Payment Services Regulations requires online retailers to use multi-factor authentication for electronic payments — typically implemented via 3D Secure (3DS2). SCA requires authentication using at least two of: something the customer knows (password, PIN); something the customer has (mobile device, card reader); and something the customer is (biometric). While the liability for SCA lies primarily with the payment service provider, retailers who do not implement 3DS2 on their checkout may see higher fraud rates and chargebacks. Retailers should ensure their payment gateway supports 3DS2 and that their checkout flow is configured to trigger SCA appropriately.
Cookie Compliance and PECR for Online Retailers
The Privacy and Electronic Communications Regulations (PECR) require UK websites to obtain valid consent for non-essential cookies — including analytics cookies (Google Analytics), advertising cookies (Google Ads, Meta Pixel), and personalisation cookies. The ICO has issued guidance making clear that pre-ticked consent boxes and consent banners that make refusal more difficult than acceptance do not constitute valid consent. Retailers using programmatic advertising, retargeting, and analytics that depend on cookie consent must implement a compliant Consent Management Platform (CMP) that records consent decisions and passes consent signals to all marketing and analytics tools.
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