How can I uniquely identify PayPal product fields for our Accounts Receivable department?

My form is a registration form for a conference. Registration fees (and related things like payment for conference dinner tickets) will go into the general PayPal account of my university. So they need to know what the incoming payment is for (call it Conference X).

How can I ensure that the information the Accounts Receivable get, for each incoming payment, will uniquely identify payments from various fields on my form as coming from my Conference X form, so that they know to put it in my Conference X account?

It seems I can do this by specifying the name of the conference in each product label, but that's obviously visible to the form customers and will look odd - "Conference X registration fee", "Conference X dinner fee", "Conference X social event", etc. So is there another way? I seem to remember something about hidden ID fields.

Any help much appreciated.

Thank you for contacting us.

The product name is the correct way to forward item information to the PayPal.

This is also possible to forward a custom field data to the PayPal, but it will only be visible within transaction details.

If you need any further assistance, please let us know.