More stimulus checks sent in the mail. 2 ways to track yours through the USPS This free and easy-to-use tool can show you when your stimulus payment is on the way to your mailbox. We'll tell you what to look for so you don't throw it away. Listen - 04:32 Stimulus check or junk mail? Know what to look for so you don't toss your new payment in the trash. Angela Lang/CNET If you're expecting your stimulus payment of $1,400 to arrive in the mail, it could be among one of the two million paper checks the IRS said it's sending out to eligible people this week. We'll tell you what to look for so you don't accidentally throw your new stimulus check away, as well as how to track your money through the mail using a free service offered by the USPS.