Hi Tomasz! I am afraid that this is wrong forum for API and Visma.net Integrations support.  Developers Visma.net is a place where we have collected all our information regarding ISV and our API for VIsma.net. All API-support is handled through separate topics in the developer forum. Community-support is included in your ISV-agreement for certified user. If a developer need ”one-to-one”-help it can be requested as consultancy. All API-support is handled in english, both for Developer Forum and Consultancy. Please have in mind that it’s an open forum so do not share any sensitive information. If you need to send specific information this can be sent to [email protected]. My best advice to you here is to repost your question here   Have a great day!   /Jonas ... View more