Reference IDs
A reference ID is a string that you assign to identify a unique end user in Persona.
A reference ID lets you link multiple Persona inquiries to a single Persona account. Inquiries created with the same reference ID are automatically associated with the same account.
Best practice
Persona recommends you provide a reference ID for an inquiry whenever possible.
Using reference IDs
You should assign the same reference ID to every inquiry you create for a single end user. This helps you:
- Easily look up the status of all interactions between this user and Persona
- More easily re-verify the user
- Guard against a user creating multiple inquiries
Choosing a reference ID
The value you choose as the reference ID can help you tie a Persona account back to your business.
Persona recommends you use the “user ID” of a user within your internal systems as the corresponding reference ID for their Persona inquiries. This provides a clear way to tie each Persona account back to your systems.
Reference IDs and PII
Prefer using UIDs instead of sensitive information such as email addresses. Persona does not treat reference IDs as PII.
Setting a reference ID
Your Persona integration method determines how you set a reference ID:
- Server API (recommended): Pass the reference ID in the
auto-create-account-reference-idfield in themetaobject in your request payload - Embedded: Pass the field to the
referenceIdparameter in the embed code - Hosted: Include the reference ID as a query string parameter (
&reference-id=abc)
You can also set a reference ID on an existing Persona account through the API.

