The home is already paid for and is under a trust dues are late but under 300 dollars in arrears.
Yes, the HOS can put a lien against the the house, even if the owner is a trust.
Now, there could be numerous issues related to the trust and whether it was properly set up, was the transfer of asset done properly, etc.
A lien attaches to the "property." Will the HOS do so for $300, who can say. On the flip side, why not just pay this balance?