How to issue a proforma invoice? BedBooking Office July 23, 2019 04:07 Updated Follow 1. Open the invoice. 2. Edit the invoice. 3. Change the Kind of document to the Proforma Invoice. 4. Save changes. Related articles How to issue an invoice? How to issue a credit note? I need additional help in invoice handling. Where can I find it? How does the "Default reservation status" work? Does BedBooking allow for booking a single bed in a room? Comments 0 comments Please sign in to leave a comment.