omniaHandbook
Registration and payments

Prepare ticket types and registration

Distinguish the ticket product, buyer, eventual attendee and valid access rights. These concepts can belong to different people at different stages.

The actual Omnia interface for prepare ticket types and registration. Fictional documentation edition; English interface.
Process diagramFrom offer to access
  1. Organisation
    Define the offer

    Ticket type, price, availability and capacity determine what someone can order.

  2. Buyer
    Place the order

    The buyer may order for themselves or several other attendees.

  3. Attendee + organisation
    Check registration and payment

    Check each attendee’s details and entitlements. Check payment status separately.

  4. Check-in team
    Check the access entitlement

    An order or payment message alone does not establish who has access.

This diagram explains the separate responsibilities. The complete buyer checkout has not yet been verified in the browser.

Prepare sales

  1. Establish the seller and the edition’s permitted payment methods.
  2. Open the edition’s ticket types and create the required variants.
  3. Check price, availability, capacity and the product’s offer periods.
  4. Configure options and follow-up questions only where registration requires them.
  5. Test the complete ordering and confirmation route with fictional buyer and attendee data.

The screenshot verifies the administration entry point. The complete buyer checkout was not exercised in this documentation pass; verify it on the installed release before opening sales.

Forms and answers

Use the form functionality for the intended questions. Keep the published question version associated with its answers. A later question change must not silently reinterpret an earlier answer.

Request only data needed for the task. A buyer may act for several attendees; do not accidentally make attendee questions depend only on the buyer.

Buyer as a person or a company

An order has one buyer, either a person or a company. A person buyer cannot carry a company name or VAT number. A company buyer needs a non-empty company name. For new orders the company name may be at most 200 characters and the VAT number at most 20. Longer input is refused with 400 and the field error too-long on buyer.company.name or buyer.company.vatIdentification. Existing orders are not changed.

These rules apply to orders placed by staff through the administration API (POST /v1/admin/commerce/events/{eventId}/orders). Self-service and voucher orders cannot set a company. There is no screen for entering a company buyer yet.

Registration terms and their version

A ticket type can carry registration terms, written per language (at most 20,000 characters each). Each ticket type also has a terms version. It starts at 1 and goes up by 1 whenever a save changes the terms in any way a buyer would read: the text in a language changes, a language is added or a language is removed. Differences in surrounding whitespace only do not count. Saving other registration settings, or renaming the ticket type, leaves the version as it is. This is not the ticket type’s version (the If-Match value), which moves on every edit. Existing ticket types were given version 1.

The version is termsVersion in AdminRegistrationConfiguration, returned by GET and PUT /v1/admin/commerce/events/{eventId}/ticket-types/{ticketTypeId}/registration. It is read-only: you cannot set it. Commerce also offers other modules a read of the current version, for the lead disclosure (see sponsors and leads and privacy).

If two people change the terms at the same time, one save wins. The other is refused with 412 and keeps no version number; read the ticket type again and save once more, and the new wording gets the next number.

I did not find a screen for registration terms or their version in the administration app at the reviewed revision; treat this as API only.

After an order

Inspect the order and each attendee’s outcome. For payment standing, invoices and refunds, use payments and administration. For group orders and reserved places, use groups and workshops.

Also test sold-out products, expired choices, refused payments and duplicate confirmations. A successful first order does not establish those outcomes.

About this chapter

Code and screen checked

Reviewed on 2026-11-14 · platform fb1761f7

Sources: 06 · 03 · Implementation

From first proposal to event: follow your role, choices and next step.