How to record a promotional gift from your own products

I am not an expert in promotional gifts. But I believe you cannot invoice yourself. You can, of course, submit the invoices for your raw materials and possibly recover vAT.

That is already included in your accounts, because you have already made the purchases of those products. Just enter them as publicity when you make the purchases, I would say?

By extension, the same applies if you sell consumables that you also use yourself. For example, how do you record it if you take pens from the sale inventory and use them yourself?

This may lead to the next question. What if the stock count shows that items have disappeared? Does this need to be reported somewhere, or is updating the stock sufficient?

I suspect that all three questions may have the same answer.

Regards,

I see that there have been no further responses to the last message, but I would also like to know the answer here.