If you have a mortgage on your home, you may be dealing with a mortgage servicer, and not the original mortgage company. A mortgage servicer is the last person or entity that the borrower or homeowner has been instructed to send payments to on the mortgage. See the following Indiana law: IC 32-30-10.5-7.
Just because they are the mortgage servicer, it does not mean that the company cannot enforce the original mortgage. For example, your original mortgage may have been through Bank A. But now you may be dealing with mortgage servicer B because Bank A assigned their interests to mortgage servicer B.
Mortgage servicers will still keep track of your monthly payments, discuss loan modifications with you, and can even start the foreclosure process.