ZaK allows you to enter your guests data and to associate them to reservations. The data entered are used by the system to create a file for the PII report or to issue the invoice/receipt.
Each reservation always has a booker (who may or may not be a guest of the stay) and possibly other "private guests" assigned to different rooms in the same reservation. For each reservation ZaK can assign a corporate or agency in addition to private customers.
☞ Docs: ZaK - Corporates
☞ Docs: ZaK - Agencies
Recording data of a private customer
↳ Useful Link: ZaK > Customers > Overview
☞ Docs: ZaK - Customers Overview
Besides, when issuing an invoice for a reservation, you can choose the recipient of the invoice among the guests and the corporate/agency:
Otherwise, within the invoice itself, while filling in the recipient's details you can choose to address it to an agency or corporate rather than the guest: