Add Product's custom field to automatic invoice

[argon]

Helo,

I've been using WHMCS for more than a year. But there's always one that itching me.

I'm running an ISP company where usually each person has 2 services or more with us and each with different city and location name. I have added those city and location name to the Product's custom fields, but I can't add those information on a automated-invoice that generated by WHMCS.

So our customer is always confused when they get the invoice, because they don't know which location that they should pay.

 

Is there any suggestion and tips on how to solve this?

 

Thanks,