The Triple Seal only is a level of authentication required for filing a lien in another state.
The lien is a claim on a property that establishes thier right to a claim against the property. It is often the first step in a seizure.
Where a mortgage is concerened, the mortage is "First Lien", and this would be a second lien. Claims get settled in turn.
This lien would be against certain specified properties. For example, when you recieved notification, did the documents tell you what property the lien was for.
Once the lien is filed, it secures the governments claim agaist the proporty, In some cases it would be a first lien, but in others it might be a second lien.
Generally, in order to sieze property, agains which they have a liend, a judgement or court order is required. That takes time. However, if they were filing certain things simultaneously, you might not have the two weeks.
I asked my contact in Manhattan for a Tax Attorney, and she promised a referrel sometime today or tomorrow morning.
Let me know if you still need the referrel.