Hello Sysadmin,
I am a system integrator currently building a product focused on B2B sales.
This documentation page(https://einvoice.firs.gov.ng/docs/system-integrator/generate-irn) outlines the requirement for obtaining a Service ID. On my account dashboard, I clicked on the business name(and a label of System Integrator) at the top left corner, which displayed a dropdown of my Service ID. However, when I tested the IRN creation using the format INVOICE001-******-20251104, I encountered an issue my Service ID shown on the dropdown is 6 characters long instead of 8.
Additionally, I plan to automate invoice signing using a near real-time process, as the system is expected to support offline functionality. Could you please clarify how I can validate a TIN as a system integrator to minimize errors caused by invalid TIN entries?
Thank you.
