Claimed to be a collection agency. Did not advise that they were "a debt collector attempting to collect a debt". Stated I had a delinquent medical bill from 2017, however no correspondence from ANY agency up until this phone call. Threatened to file a lawsuit against me if I did not pay the alleged debt. Refused to send me any type of description of the debt, would only provide name of the hospital and "date of delinquency".