Calls originate from the Revenue Group, calling number is XXXX XXXX XXXX. Calls received XXXX/XXXX/2015, XXXX ; XXXX/XXXX/2015, XXXX. Both times the caller indicated an unspecified debt is owed and was told we do not discuss financial matters on the phone. Caller was further informed to submit the nature and specifics of the alleged debt in writing to us. To date, no such correspondence has been received. Numerous other calls have been received from this group as shown on our phone 's caller id, but went unanswered.