D3G Not sure I understand this one...if my company owes you money, what does it matter which A/C you block....?
IIRC legally the airport operator can only detain the airframe (lien) that accrued the specific debt. Usually after all other efforts had been exhausted. Not only that but the aircraft can be detained for a debt accrued by a previous owner. So Bloggs air who operated the aircraft and went bust, their debts can still be chased by placing a lien on one of their airframes with a new operator.