Create a new invoice in COUNT with full product, customer, and tag details.
UUIDs Only: All identification uses UUIDs. Integer IDs are not exposed to partner integrations.
Email Uniqueness: Customer emails must be unique within a team. Always use the Find by Email endpoint before attempting a POST.
Address Management: Both billing and shipping addresses support full field sets (Street, City, State, Zip, Country).
Service vs Product: Both physical goods and labor services are managed via the same underlying logic; ensure you categorize them correctly in your local system.
Product Categories: For customers intended to be billed, ensure they are linked to products that have a category account assigned in COUNT, or invoice creation will fail.