I would not touch her offer, but it is possible to do this:
http://www.ppsa.ca/ppsacaV3/general/faq.jsp
What is a lien?
A lien is a filing of notice for a security agreement against personal property to guarantee payment of a debt. It is not linked to the Land Registry. For example, when you borrow money to purchase a car, the lender files a lien on the vehicle. If you default on the loan, the lender can take the car back. Once the debt is fully repaid a release of the lien (also known as a discharge) is provided by the lender. A lien registered under the PPSA or RSLA act is a publicly accessible document. Any company or individual can order a search to determine if another company or individual has any liens against themselves. PPSA is not protected by provincial privacy regulations. If you wish to register a lien against a parcel of land in the Land Registry, contact your lawyer for assistance.