If you received a payment electronically last time, you’ll receive your money the same way this time. If you received a check by mail last time but have moved since then, the check will either be forwarded to your new address (if you have USPS mail forwarding) or returned to the IRS. If your payment gets returned, the IRS will hold your payment until you provide a new address. You will need to monitor the payment portal if you haven’t received your check and suspect it’s due to a change of address—you won’t be contacted by the IRS to update your information.