Do you have property in rural eastern Ontario or West Quebec?  If you do, you could have mining claims registered against your property without your knowledge or consent.

How do you find out?  Check the mining claims databanks of the Ontario and Quebec governments.

Mining claims in the Province of Ontario are available for research courtesy of the Ministry of Northern Development and Mines.

Click here:  http://www.mndm.gov.on.ca/mndm/mines/lands/claimap3/default_e.asp

Mining claims in the Province of Quebec are available for research in the GESTIM database run by the Ministry of Natural Resources and Wildlife.

Click here:  http://gestim.mines.gouv.qc.ca/