Congress & Registration Glossary
Key terms used in congress registration, institutional billing, and conversational AI registration.
Attendee / Delegate
The individual registering to participate in a congress or event, as distinct from the payer or billing contact.
Badge / QR check-in
A printed or digital pass containing a unique QR code, scanned onsite to verify an attendee's payment status and record entry.
CME (Continuing Medical Education) tracking
Recording which sessions a delegate actually attended at a medical or scientific congress, used to issue attendance certificates and credit hours.
Conversational registration
A registration method where a delegate completes sign-up through a natural conversation (via WhatsApp or phone) instead of filling out a static web form.
Institutional billing
A billing arrangement where a company or institution, rather than the individual delegate, is invoiced for one or more registrations — typically requiring a VAT/tax ID and purchase order reference.
OIB
Croatia's unique personal and business identification number, required on Croatian invoices for both individuals and companies.
Payer type
A classification of who is financially responsible for a registration — an individual or a company — which determines the billing and invoicing flow used.
PCO (Professional Congress Organiser)
A specialised agency that plans and manages logistics, registration, and often finances for scientific, medical, or corporate congresses on behalf of a society or client.
Proforma invoice
A preliminary invoice issued before payment, used by institutional buyers to obtain internal budget approval ahead of the final invoice.
R1 invoice
A Croatian invoice format used for VAT-registered business-to-business transactions.
Registration channel
The medium through which a delegate completes registration — for example WhatsApp, phone call, or web form.
Registration drop-off
The point at which a prospective delegate abandons a registration process before completing it, commonly linked to long or complex web forms.
VAT reverse charge
An EU tax mechanism for certain cross-border B2B transactions where the buyer, rather than the seller, accounts for VAT.