716-218-4103

They called my husband looking for me, told him it was a federal matter and they had sent a certified letter, he told them that we hadn't received anything and they told him that they had proof that it was signed for.  So he asked for the proof to be sent by certified mail and they hung up.  Didn't give a name, number was 716-218-4103

Federal matter?  OK, well I have to assume that it would be a civil matter otherwise the FBI or the US Marshall's would have been knocking at your door.  If that is the case it would have to been for an amount $75,000 or higher and it would have had to have been a diversity case.  You would have certainly known if the mailman had a certified letter for you, but you could have simply asked for the number and looked it up on the USPS website.