When you disable a token, the assigned user can no longer use the token to authenticate.
In the Security Console, click Authentication > SecurID Tokens > Manage Existing.
Click the Assigned or Unassigned tab to view the list of tokens that you want to disable.
Select the checkbox next to the tokens that you want to disable.
From the Action menu, click Disable.
RSA SecurID Tokens
Enabled and Disabled Tokens