If the property tax is unpaid the township may offer a tax sale certificate. If after 2 years the tax certificate isnt redeemed you can file an action for foreclosure. This is for any property in which the property taxes are delinquent. Contact the township tax office for the status of the property.
If taxes are unpaid the town could sell tax lien certificates for the unpaid taxes to the public in an auction. The auctions usually happen once a year in most towns. You can find out when each town has their public auction by visiting the town hall and asking the tax department. There are professional investors who go to these auctions looking to buy tax liens on as many properties as possible. The town usually hands at a list of all properties that are late on taxes, and how much they owe in taxes a few weeks prior to the auction.