<prompt> Human: Hi,When my brother was 17, he required surgery billed to my parents insurance company for several thousand dollars. Over a year passed, and somehow a 2k bill went unpaid out of a much larger amount. Over the last two weeks, a debt collection agency has called my brother 23 times, threatening to attach the debt to his credit report, even though hes not the subscriber on the insurance plan, and was not 18 when services were rendered. My parents and I found about this two days ago. Were not sure what hes said to the debt collector or the hospital. What should my parents be doing to resolve this and make sure it doesnt hit my brothers credit? Also, is what the debt collector did legal?Thanks!  <response>: Request they provide proof of debt owed by your brother. Check the link on dealing with debt collectors that auto mod provided 