Selling online without letting the digital channel become an island: outdated stock, duplicated orders and invoices outside Verifactu. We develop online stores that integrate with your ERP from day one, comply with current regulations and are built so your team can manage them without depending on external help for day-to-day operations.
The usual problem is not the online store itself: it is that the online store lives disconnected from the rest of the business. Stock is updated manually once a day, orders arrive by email and someone re-enters them into the ERP, and the invoice is generated in a system different from the one required by the Tax Agency. When volume grows, that model breaks down. We build the digital channel as an extension of the management system, not as a parallel project: the catalogue, inventory and invoicing are the same ones used by the sales team and the warehouse.
The regulations affecting ecommerce in Spain have tightened significantly in recent years. The Law 34/2002 on Information Society Services (LSSI-CE) requires a legal notice, cookie policy, terms of sale accessible before purchase and GDPR-compliant consent mechanisms. Directive (EU) 2019/2161, known as the Omnibus Directive, transposed in Spain in 2022, additionally requires that the previous price be shown when a discount is applied, that the authenticity of customer reviews be disclosed and that consumer rights in online purchases be protected. Non-compliance can result in fines of up to 150,000 euros per serious infringement under Law 34/2002 (LSSI-CE). We design the store with these obligations built into the architecture from the start, not added afterwards as patches.
The Verifactu deadline — 1 January 2027 for companies and 1 July 2027 for the self-employed and other businesses, according to Royal Decree-Law 15/2025 — makes ecommerce invoicing a critical variable in any project. Every online sale that generates an invoice must go through an approved invoicing system that issues high-integrity records with a verifiable QR code. We integrate the store with Verifactu-compatible invoicing modules so that the order-to-invoice cycle is automatic, traceable and audit-proof from launch.
We analyse the catalogue, the sales model (B2C, B2B or mixed), the current management system, order volumes and regulatory requirements. We identify which ERP integration is essential from day one and what can be incorporated in later phases.
We propose the most suitable solution for the case: a native ecommerce module from the ERP (Odoo Commerce, Sage B2C), a specialised platform integrated via API (WooCommerce, Shopify headless) or a custom development on proprietary technology. We define the data architecture, order flow and integration with warehouse, invoicing and CRM.
We build the store with a design tailored to brand identity, SEO-optimised product pages and a fully integrated legal layer: legal notice, GDPR-compliant privacy policy, cookie banner, terms of sale with consumer rights under the Omnibus Directive and a certified payment gateway (PCI DSS). We load the catalogue and synchronise it with the ERP inventory.
We support the go-live with load testing and full purchase-flow testing. We train the team to manage the catalogue, orders and returns. After launch we offer technical and evolutionary support: new categories, marketplace integrations (Amazon, El Corte Inglés, Leroy Merlin) and adaptation to regulatory changes such as Verifactu.
The operational detail: what we deliver as part of the work and what we keep alive afterwards.
Native ERP integration
Bidirectional synchronisation of stock, prices, orders and customers between the online store and the management ERP (Odoo, Sage, Holded, a3ERP or others). A single master data source for the entire business, with no double entry or inventory discrepancies.
Automatic invoicing with Verifactu
Each completed order generates its invoice in the approved invoicing system, with a high-integrity record and a QR code verifiable by the Spanish Tax Agency (AEAT). Compliance guaranteed from launch, with no additional manual work.
Integrated legal layer and GDPR
Legal notice, privacy policy, cookie consent management (CMP compliant with GDPR), purchase terms with consumer rights under the Omnibus Directive and withdrawal forms. Reviewed by the Summum Consultoría team.
SEO catalogue and product pages
Clean URL architecture, per-product and per-category metadata, structured data (Schema.org Product) and optimised image loading. The catalogue is designed to rank in organic search from day one.
Payment gateway and shopping experience
Integration with Redsys, Stripe, PayPal and Bizum. Checkout optimised to reduce cart abandonment: minimum steps, address autocomplete, clear cost summary (VAT, shipping) and immediate email confirmation.
Management panel for the team
Administration interface accessible to non-technical staff: order management, returns, discounts and promotions with prior-price control (Omnibus Directive), sales reports and data export for accounting.
An online store is the digital point of sale, but its performance depends on marketing bringing qualified traffic, regulatory compliance being in order and order management being efficient: that is where the rest of Grupo Summum comes in.
When the store already exists and the challenge is connecting it to the ERP without rebuilding it: catalogue, stock, order and invoicing integration via custom connectors or iPaaS platforms.
View service → sistemasAdapting the store's invoicing module to Verifactu and the upcoming mandatory B2B e-invoicing obligation, with AEAT approval and secure archiving.
View service → consultoríaLegal review of the ecommerce site: legal notice, terms of sale, Omnibus Directive, cookies and GDPR applied to the digital channel, handled by Summum Consultoría specialists.
View service →Shopify and WooCommerce are solid platforms to start with: quick to launch and with wide plugin ecosystems. Their limitations appear when the business has a complex catalogue, needs deep ERP integration or requires custom B2B pricing logic. We work with both options: we implement and configure these platforms when they fit, and we develop on proprietary technology when requirements go beyond them. The choice depends on the diagnosis, not a predefined preference.
Yes, if it generates invoices. The Verifactu system affects all taxpayers who issue invoices with invoicing software, regardless of the sales channel. Royal Decree-Law 15/2025 sets the deadline at 1 January 2027 for companies and 1 July 2027 for the self-employed and other businesses. An online store that invoices automatically must be integrated with an approved system from that date.
The LSSI-CE requires a legal notice with company details, general terms of sale accessible before purchase, a GDPR-compliant privacy policy and cookie management with prior consent. The Omnibus Directive, in force in Spain since 2022, adds the obligation to show the previous price when offering a discount for at least thirty days, to disclose whether customer reviews have been verified and to respect consumer withdrawal rights. The Summum Consultoría team reviews and drafts these documents as part of the project.
A standard project for an SME with a catalogue of up to five hundred references and integration with one ERP can go live in eight to twelve weeks. Projects with large catalogues, multiple warehouses or complex B2B pricing logic require phased planning. We define this precisely during the initial diagnosis.
Acquisition strategy and performance marketing (SEO, SEM, email marketing, social media) are the domain of Summum Marketing, our group's marketing division. We coordinate both projects so the store's technical architecture is optimised for campaigns from the start: canonical URLs, structured data, Google Analytics 4 and Meta Pixel integration included in the development.