Managing tax compliance in Spain has become increasingly complex due to the country’s strict fiscal regulations and evolving e-invoicing mandates. If your business operates in Spain and you are using WHMCS, it’s now vital to comply with Verifactu, the country’s official antifraud law, or TicketBAI (Basque Country). Therefore, whether you are a hosting provider, SaaS company, or service-based business, our Spanish Fiscal E-Invoicing module ensures your Spanish operations are fully aligned with national tax regulations.
This module generates tax-compliant invoices for Spanish clients using Fiskaly’s (https://www.fiskaly.com/signes/verifactu) SIGN ES API. It supports XML exports, CSV reporting, and full log tracking within WHMCS.
Yes, if your business is located in Spain and your yearly turnover is lower than 6 million a year, you need to comply with Verifactu. This module automates that process for you.
Not at all, the module only activates for clients whose country is set to “Spain “in WHMCS. It runs independently and doesn’t affect your invoicing for other countries.
You can export invoice data in XML (for tax compliance) and CSV (for internal or accounting use).
Absolutely. The module uses token-based authentication and encrypted communication protocols.
API is not free. It will cost you €20 Euro per month and you will get 5000 signatures per month.
Not at all, the module only activates for clients whose country is set to “Spain “in WHMCS. It runs independently and doesn’t affect your invoicing for other countries.
The module allows compliance with both. Depending on the company’s tax domicile, this will be obliged to use one or the other (TicketBAI if the company is located in the Country Basque and Verifactu if it is located in the common territory).
Yes, Fiskaly is registered as a guarantor software in the three regional treasuries in the country.
Yes, You are supposed to register all them.
You can export invoice data in XML (for tax compliance) and CSV (for internal or accounting use).
SIGN ES complies with 100% of the tax regulatory requirements. To protect the security and privacy of taxpayers’ tax data, it adheres to strict technical and organizational security measures and is ISO 27001 and ISO 9001 certified.
Yes, the audit regulations in Spain cover both full invoices and simplified invoices (tickets), as well as other commonly used invoices such as corrective invoices or exchange invoices.
The submission of invoices to the AEAT through the Verifactu systems has two deadlines:
January 1, 2026: Mandatory (entry date for companies and corporate tax payers).
July 1, 2026: Mandatory (entry date for all other businesses and self-employed workers).
Fiskaly, as a social partner of the AEAT, allows billing records to be submitted without the need to use the taxpayer’s digital certificate
The best place to start if you need help with a specific product is to contact the developer. All WHMCS Marketplace developers have both a website and support URL listed.
Added support for new invoice types: SIMPLIFIED and COMPLETE.
Added an option to disable email notifications when creating invoices for specific payment gateways (configurable in the addon module settings).
Implemented REMEDY functionality for updating invoice descriptions.
Implemented CORRECTION functionality for invoice refunds.
Introduced separate invoice series for invoice creation, updates (REMEDY), and refunds (CORRECTION).
Added taxpayer validation on client creation and update.
Added a custom button on the admin invoice view to manually sync existing WHMCS invoices with Fiskaly.
Implemented a new cron job to automatically sync invoice status from Fiskaly to WHMCS under E-Invoice Logs.
Added support for international invoices.
Disabled taxpayer validation when operating in test mode.
Improved discount handling — discounts are now sent to AEAT as a separate invoice item with a negative value.
Fixed an issue with invoice summary length — now correctly limited to 256 characters, including special characters (e.g., %).
Fixed an issue with the Invoice Payment Confirmation QR Code.
Fixed amount and tax calculation issue
Integrate your financial data stored in WHMCS into QuickBooks Online.
Xes @xes4183
⚠️ WARNING / ADVERTENCIA ⚠️
[English below / Inglés más abajo]
— ESPAÑOL —
ADVERTENCIA: Cobros duplicados sistemáticos confirmados
Llevamos siendo clientes de WHMCS Global Services desde 2016 (módulo VMware, $49.90/trimestre). Tras una auditoría forense de las 41 facturas de nuestro portal WGS cruzadas con nuestro historial completo de PayPal, hemos descubierto cobros duplicados sistemáticos durante más de 4 años.
Nuestra suscripción PayPal cobra $49.90 en la fecha de vencimiento (día 21). El sistema de WGS aplica un recargo de $4.99 por "pago tardío" el día 22 — UN DÍA DESPUÉS de que el pago ya se había procesado. Resultado: $104.79 cobrados por un servicio de $49.90. Cada trimestre.
Reportamos este problema en diciembre de 2021 (tickets #411849 y #658467). Su agente reconoció el error y eliminó los recargos cuatro veces. Nunca corrigieron la causa raíz. El problema continuó 4 años más.
Presentamos reclamación formal por $549.52. Primero negaron todo. Después ofrecieron un crédito (admisión implícita). Después se comprometieron POR ESCRITO a devolver $384.85 — en dos ocasiones. Seis compromisos escritos en 25 días. Ninguno cumplido. Tres disputas de PayPal resueltas a nuestro favor ($164.67). Siguen debiendo $384.85.
Resulta irónico que una empresa que no es capaz de gestionar correctamente su propia facturación — con cobros duplicados sistemáticos y recargos fraudulentos durante años — venda un módulo de cumplimiento fiscal. Si no pueden evitar cobrar dos veces por el mismo servicio a sus propios clientes, ¿qué confianza puede generar su módulo de facturación electrónica para cumplir con la normativa Verifactu/TicketBAI?
Dossier forense completo: https://get.tomahost.net/s/gA6RzsD37zEJLkP
Si eres cliente de WGS con suscripción PayPal, REVISA TUS FACTURAS YA.
— ENGLISH —
WARNING: Systematic duplicate billing confirmed
We have been a WHMCS Global Services customer since 2016 (VMware module, $49.90/quarter). After a forensic audit of all 41 invoices cross-referenced with our PayPal history, we discovered systematic duplicate billing spanning 4+ years.
Our PayPal subscription charges $49.90 on the due date (21st). WGS's system adds a $4.99 "late fee" on the 22nd — ONE DAY AFTER payment was processed. Result: $104.79 charged for a $49.90 service. Every quarter.
We reported this in 2021 (tickets #411849, #658467). Their agent acknowledged the error four times. Never fixed it. Problem continued 4+ years.
We filed a formal claim for $549.52. They denied it, then offered credit (implicit admission), then committed IN WRITING to refund $384.85 — twice. Six written commitments in 25 days. Zero fulfilled. Three PayPal disputes resolved in our favor ($164.67). They still owe $384.85.
It is ironic that a company unable to manage its own billing correctly — with years of systematic duplicate charges and fraudulent late fees — sells a fiscal compliance module. If they cannot avoid charging their own customers twice for the same service, what confidence can their e-invoicing module inspire for Verifactu/TicketBAI compliance?
Full forensic dossier: https://get.tomahost.net/s/gA6RzsD37zEJLkP
If you are a WGS customer with a PayPal subscription, CHECK YOUR INVOICES NOW.
— E-Internet S.C. (Spain) — Customer since 2016
Raúl Martinez @ral4341
They sell you a module that doesn't work. I bought it two weeks ago and we're still reporting errors that prevent the module from working. They take a long time to respond, they don't test their developments, and you have to constantly write to them about the bugs.
WHMCS Global Services @whmcsglobalservices
Hello @ral4341,
Owner@WHMCS Global ServicesWe could not find any purchased services associated with your account. Please note that we always ensure all support tickets are updated on time. To help us resolve your issue, kindly confirm your license key and reach out to us at support@whmcsglobalservices.com
Our team will be happy to assist you further.