Following the expiration of a statutory period, unpaid tax liens are typically sold at public auction where interested bidders seek to acquire the lien at a favorable interest rate that the delinquent homeowner will pay upon redemption.

FORBES: Feds Nab Corporate Bid Rigger In Tax Lien Auctions

But then as the interest rate reset, they now became delinquent because their payments went up so much.

NPR: Time for Renovation at the FHA?

Previously facing foreclosure, these delinquent borrowers have just gotten another year on their adjustable rate mortgage.

FORBES: Fanning The Flames Of Moral Hazard With Foreclosure Moratorium

According to this article a Louisiana tax lien certificate will give you a nice rate of interest if the owner pays the delinquent real estate tax.

FORBES: Chase Tries to Fix Mortgage Screw-up by Arguing Borrower Not Good at Latin

Or, he said, if you are delinquent for 8-10 months you can get modified into a 2% rate, but that was obviously not for me.

FORBES: Banks Need To Offer Low Refinance Rates For Responsible Borrowers, Not Deadbeats

For example, if a credit card has a 0% APR for 12 months, this interest rate cannot be changed until the offer ends or the consumer becomes seriously delinquent.

FORBES: Fed Closes Credit Card Act Loopholes