collecting debt for retired physician
I live in the state of Oregon and a collection agency contacted me regarding a medical bill they state I owe. I asked them to validate the debt and they have not done so. They did send a computer generated invoice but nothing that has my signature on it from the original creditor. I tried to make a payment agreement but the agency said the physician has since retired and they are not able to make agreements because of this. If the physician has retired how are they able to legally collect on this debt? Plus is a computer generated invoice validation enough without my signature or an agreement between me and the original creditor?