If the IRS is mailing you a check it will be sent in an envelope via first class mail. There will not be any sort of tracking number. So watch your mailbox and open all mail even if it looks like a "junk mail" envelope. Be aware that the IRS is severely backlogged so many things take much longer than normal. Two to four weeks might turn into a longer wait.
**Disclaimer: Every effort has been made to offer the most correct information possible. The poster disclaims any legal responsibility for the accuracy of the information that is contained in this post.**