Access
Access: Account Settings > Management > Registration Statuses (Available only to Administrators)
Tagging workflow
Assign tags to any of the standard registration statuses.
Click in the field next to a status.
Select one or more of the tags listed.
The tags available are those set up on Account Settings > Management > Tags with "Registration Statuses" selected as data Object.
Default Statuses visibility
Note: Standard statuses are shown only if the Show Default Statuses option is selected on Account Settings > Implementation > Security.
That option is normally selected for an account, but if it is cleared on your account then the default statuses are not listed on this page and therefore cannot have tags assigned to them.
API 2.0
All tags are exposed via Certain's API 2.0.
The APIs associated with the objects will return the associated tags if you include an includeList=tags attribute.
Reference
Standard registration statuses are:
New
Requested Invitation
Waitlist Hold
Invited
Request Denied
Invitation Sent
Pre-Registered
Declined Invitation
Cancelled
No-show
Attended
Custom Registration Statuses
Tags can also be applied to custom registration statuses.
See Event > Plan > Event Setup > Custom Statuses.