A lien is an interest in property, similar to a security interest, which enables a creditor to retain (usually) or seize (occasionally) property belonging to a debtor. The rules governing liens in Alberta (at the time of publication) were widely varied, and controlled by a number of different statutes. This report suggests the creation of a unified Liens Act which would resolve problems such as the registration of liens, the priority of different interests on property (held by creditors), and the powers that a creditor had over property held by lien.