E-Invoicing: Quadient Reaches Key Milestone as Serensia Successfully Passes French Tax Authority Testing Quadient (Euronext Paris: QDT), a global intelligent automation platform enabling secure and professional business connections, announced today that Serensia, its recent acquisition in the digital segment, has successfully completed interoperability testing in live conditions as part of France’s phased rollout of mandatory e-invoicing. Serensia, a certified French e-invoicing platform connected to the P ...