A year and a half ago, my brother asked me if he could have his unemployment check sent to my home address since he was going to be moving within our city but wasn't exactly sure where at the time, so I agreed. It's now a year and a half later, and he has recently begun receiving mail from out-of-state authorities for back child support owed in another state from when his son was a minor. Total amount owed in arrears is $57,000+. I asked my brother if he was going to have his address changed and he said "no" because he owes the IRS along with the back child support. My question is: Is it illegal for me to allow him to continue using my address knowing that he is doing this to avoid his responsibilities?