Mandatory Product Field when ordering

-- HikaShop version -- : 3.2.1
-- Joomla version -- : 3.8.2

Hey,

I tried to find a solution online and in the forum, but couldn't find anything, maybe someone can help me out.

What I need is, that if the customer orders a specific product, he needs to fill out a field with a number before he can submit the order.
Is there a function like that?

Thank you.

Hey,

Great, thank you for the answer. Works perfectly. I used the 'Order' way, since it is just mandatory for some products, not the whole catalog.

Hi Nicloas,
It works great so far. Just one more thing, is it possible, that beside a maximum length, I can set a minimum length for the field?
I'm using the field type 'text area' and would need the customer to put in a 17 digit combination of letters and numbers.