When you delete a token, the token is removed from the internal database and can no longer be assigned. If it is already assigned to a user, the user cannot use the token to authenticate.
In the Security Console, click Authentication > SecurID Tokens > Manage Existing.
Click the Assigned or Unassigned tab, depending on whether the tokens you want to delete are assigned to a user or are unassigned.
Use the search fields to find the token that you want to delete.
From the Search results, select the checkbox next to the token or tokens that you want to delete.
From the Action menu, click Delete.
Click OK in the delete dialog box to confirm deletion.
RSA SecurID Tokens