> For the complete documentation index, see [llms.txt](https://old-manual.converia.de/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://old-manual.converia.de/en/attendees/setting-up-the-registration/basic-setup-of-the-registration/free-events-without-invoices.md). # Free events without invoices Configuration -> Attendee Registration -> Configuration If an event is free of charge and does not contain any additional chargeable offers, it is not necessary for attendees to be sent invoices. In this case, **invoices** **can** **be suppressed** **for** **the frontend.** This deactivation is done in the invoice configuration via *Hide invoice in frontend: Yes* (Fig. 1).

## Effects of hiding invoices If invoices are hidden in the frontend, this has the following effects on the event: * The person making the booking will not receive an invoice in the last step of the registration process and will also not be able to retrieve it in the *C3 - document archive* (Fig. 2). * No automatic invoice e-mail will be sent after the booking has been completed. * The invoice info mail only contains a link to the booking confirmation, not to the invoice. The **text of the invoice info mail should be checked before sending, if necessary**. * Invoices can only be deactivated completely in the frontend for attendees. The invoice function in the backend is still active; however, this area can theoretically be ignored. * If invoice links are called up, the message "*This invoice document is blocked"* is displayed. You have to be **logged into the backend at the same time - only then the invoice document can be viewed** . * If the deactivation of the invoice is reversed in the frontend *(Hide invoice in frontend: No),* all **persons logged in up to this point can also call up invoices at a later date**. However, no automatic emails will be sent subsequently.

Fig. 2: Completing registration with hidden invoice

Fig. 3: View of the document archive for events with hidden invoices

## **Free events with invoice** Cancellation and processing fees may also be charged for free events if necessary. In this case, you should not work with hidden invoices. To ensure **that no invoices** **are sent** to participants, which do not contain a booked offer, make sure that *Offer packages with price 0: Show* is selected in the invoice configuration (Fig. 3)**.**