This # showed up on my caller ID and caller name showed 'Manitoba'.  The voice message left was supposedly from the GST dept of the taxation office.  They claimed that they had a cheque issued to me returned to them and wanted me to call "Rose" at 866-715-5668.  This number, I also looked up and comes from the USA.  Obviously a phishing campaign.  I have all government dealings direct deposited.  HA!  I DID NOT RETURN THIS CALLER!  >:(