Legal Notice

Last updated: 16 August 2026.

Service provider

In accordance with Spanish Law 34/2002 of 11 July on information society services and electronic commerce, the operator of this website and the FiscalRail service is:

Legal name: Negative Epsilon SL.

Tax identification number (NIF): B02850360.

Registered office: Paseo de la Castellana 194, 28046 Madrid, Spain.

Email: contact@negativeepsilon.com.

Mercantile Registry: Madrid Mercantile Registry, volume 41045, folio 43, section 8, sheet M-727873, entry 1.

FiscalRail is a product and trade name of Negative Epsilon SL. This notice covers fiscalrail.com, dashboard.fiscalrail.com, api.fiscalrail.com and docs.fiscalrail.com.

Purpose

The websites provide information about FiscalRail and access to an API and dashboard for creating, storing and managing invoices and supported fiscal records. The service is intended for businesses and professionals, not consumers.

Terms and privacy

Use of the service is governed by the Terms of service. Our processing of personal data is explained in the Privacy policy. When we process invoice data on a client’s behalf, the Data processing addendum applies.

Intellectual property

The websites, software, documentation, designs, trademarks and other content are owned by Negative Epsilon SL or used under licence. No rights are granted except those expressly stated in the Terms or required to use the public website normally. You may not reproduce, distribute, modify, scrape or exploit protected content without permission or another lawful basis.

Accuracy and external links

We work to keep public information accurate, but documentation and product capabilities can change. Tax and compliance material describes the supported FiscalRail product surface and is not legal, tax or accounting advice. Links to third-party websites are provided for convenience; their operators control their content and privacy practices.

Law and contact

This notice is governed by Spanish law. The contractual venue in the Terms applies to clients. For questions about this notice, contact contact@negativeepsilon.com.