How to update an exhibitor's VAT and accounting details

Use this guide when you need to set or update VAT registration, legal entity name, or invoicing details for an exhibitor.

⚠️ These fields are global. VAT, legal name, invoice address, and invoice email are stored at the environment level. Updating them for an exhibitor in one event will cascade to every other event this exhibitor is attached to within the same data environment.

Request

Bash

curl -X POST "https://your-event-domain.com/api/v2/exhibitor/set" \
  -H "Authorization: Bearer your_api_key_here" \
  -F "event_id=7" \
  -F "exhibitor_id=1200" \
  -F "vat=DE123456789" \
  -F "legal_name=Acme GmbH" \
  -F "invoice_address=Musterstraße 10, 10115 Berlin" \
  -F "email_invoice=billing@acme.com"

Available fields

Parameter	Type	Description
`vat`	string	VAT registration number
`legal_name`	string	Legal entity name
`invoice_address`	string	Invoicing address
`email_invoice`	string	Email address for invoices

Notes

Include only the fields you want to change — any field not included will remain unchanged
VAT numbers are validated through the VAT Information Exchange System (VIES). The number submitted must be officially registered
You can identify the exhibitor by exhibitor_id, external_id, or username