> ## Entering Selected Identifier

> This field on the Add Subject Records form is open for entry if a Clinical Group name is highlighted. A subject can have a different identifier or study ID for each Clinical Group. The field can be auto-formatted for each Clinical Group (see Setting Clinical Group identifier format). You can override or turn off the formatting at any time using the Format On button.

> Related topics
> Entering subject records
> Format On button

> #### Entering Universal ID

> The Entering Universal ID field on the Add Subject Records form should be reserved for a unique ID that can identify duplicate subjects entered by multiple sites in a multi-center trial. Note that using a Social Security number for this ID in the United States can be subject to legal limitations. This field can be automatically formatted by the administrator (see Setting Universal ID format).