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ABC World News Tonight on Instagram: "The U.S. Postal Service is rolling out changes for postmarks in the new year — clarifying the new rules saying postmarks will be added when an envelope is processed rather than the day that it gets submitted. @whitjohnsontv reports."

The U.S. Postal Service is implementing a significant change to its postmark process, which could affect how you send important mail, such as bills and ballots. Traditionally, the postmark indicated when mail was accepted by the post office, serving as proof for meeting deadlines, like those on election day. Moving forward, the postmark will show the date an envelope is first processed by an automated sorting machine, not the drop-off date. To ensure timely delivery, it's recommended to mail tim