In Massachusetts, you cannot legally drive your car just waiting for the new registration sticker to arrive in the mail, as you need current, valid registration and a proper decal displayed; however, if you renewed online and have your renewal receipt or confirmation as proof, an officer might let you go if they run your plate and see its valid, but you risk a ticket for not displaying the sticker, so its best to get temporary tags or use the RMVs print-at-home option if available for immediate driving. Why You Need the Sticker: Legal Requirement: Massachusetts law requires a current registration and plate decal to operate a vehicle on public ways, with no grace period for expired tags. Risk of Tickets: Driving with an expired (or missing) sticker can lead to fines, towing, and confiscation of plates, even if youve renewed online. What to Do While Waiting: Carry Proof of Renewal: Keep your online confirmation email or printed receipt in your car; show this if stopped, as the officer can verify the renewal in the system. Print Temporary Tags: If you renewed online through the Mass.gov website (depending on the transaction), you might be able to print a temporary registration/plate, notes a Reddit thread. Get Temporary Plates: For new purchases or lost registrations, visit an RMV branch or use their drop-off service for immediate or faster temporary plates/documentation. In Summary: While the system shows your car is validly renewed, the lack of the physical sticker is a violation. The safest approach is to secure temporary documentation from the RMV or avoid driving until the sticker arrives to prevent tickets, despite officers often being understanding when you have proof. AI can make mistakes, so double-check responsesRenew your vehicle or trailer registration - Mass.govAll motor vehicles or trailers must maintain a valid registration with the Registry of Motor Vehicles (RMV). Vehicle registrationsMass.govReplace your vehicle registration or plate decal - Mass.govYou must have a current registration and plate decal to drive your vehicle legally. If your registration has been lost or stolen, Mass.gov