9743b657_ent___Philippine_Law_Reviewers__Charging_Lien
[0] 1. Nature [Retaining Lien] Passive Lien: It cannot be actively enforced. It is a general lien [Charging Lien] 
Active Lien: It can be enforced by execution. It is a special lien.
Legal Ethics Chapter IV – The Lawyer and the Client | Philippine Law Reviewers
Charging Lien