A new U.S. Postal Service rule will affect the postmark dates on your mail

What to know about USPS postmark changes and the impact on bills, taxes and election ballots

USPS clarifies postmark rules that could affect mail deadlines

New USPS rule alert

USPS clarifying postmark processes

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."