Q: Where do I get information on correcting loan payments?

A: 

The following auditing services can do a thorough review of residential mortgages for lender calculation errors:

• Mortgage Monitor, 1100 Summer Street, Samford, 06905; (203) 973-0288; mortgagemonitor.com.
• Loantech, Box 3635, Gaithersburg, MD 20885; (301) 762-7700; loantech.com.

But keep in mind that these services come with a fee, and your lender should be able to work with you to make your own accurate calculation.