OlegsUW

Thank you for such a detailed answer. First option looks fine for second one I need to have the system installed to look closer. But the idea is clear to me. While I reading your answer I realise that domain is not a product entity. What can be possible approaches for domains? I am also discussing it with our team if we really need this products code but we have them in our self written system Thank you in advance

I read documentation and general things about WHMCS but I am not able to find where I can set specific codes for products. I mean codes what usually go to invoices. Mostly its for bookkeepers. Is there any way how I can define them in the system or additional development/module required? Thank you