If you're one of those people who dashes into the post office on the very last day to pay your property taxes by mail – that's Jan. 31, 2026, for full payment or the first of two installments in Door County and across Wisconsin – now's the time to change that habit.

That's because of a recent policy change by the U.S. Postal Service that affects when envelopes receive their postmarks and could cause procrastinators to be delinquent instead of last-minute tax filers.

The change, implemented in August, means a postmark is no longer stamped on an envelope when it's first handled by the postal service. Instead, postmarks now are applied at the regional sorting centers for the mail, which means envelopes might not be postmarked until one or two days after they're dropped in the mailbox.

That

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