# Procurement & Invoicing ## Company & Legal * **Kansi Solutions GmbH**, Rotenbergerweg 24, 66640 Namborn, Germany * HRB 107712 (Local Court Saarbrücken) * VAT ID: DE346326134 * See [Contracts & Legal](/commercial/contracts-and-legal.md) for Terms of Service, Privacy Policy, and Imprint ## Invoices & VAT * Invoices are issued automatically via the checkout system * VAT (e.g., 19% in Germany) is shown where applicable * Need a PDF invoice or custom billing fields? Include your company details during checkout or contact [Sales](https://rtkdata.com/contact/) ## Payment & Licenses * Monthly or annual subscriptions via credit card * Credentials are delivered immediately after payment confirmation * One license = one data stream (one active device at a time) ## W-9 / Company Documents For vendor onboarding or company documentation requests, email or use the [Contact page](https://rtkdata.com/contact/). --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.rtkdata.com/commercial/procurement-and-invoicing.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.