Yes — under the UAE's mandatory e-invoicing regulations, using an FTA-accredited service provider is not optional. The ASP acts as a trusted intermediary that validates your invoice against FTA technical specifications, digitally signs the document, transmits it via the Peppol network to the buyer, and simultaneously reports the transaction data to the Federal Tax Authority. Without an accredited ASP in the chain, your invoices will not be considered legally valid under the UAE framework, regardless of their content or format. every person conducting B2B or B2G transactions in the UAE must therefore have a contracted ASP relationship in place Wave 1 (AED 50M+ revenue): appoint ASP by July 31, 2026, go live by January 1, 2027. Wave 2 (all other businesses): appoint ASP by March 31, 2027, go live by July 1, 2027. Government entities: appoint ASP by March 31, 2027, go live by October 1, 2027.