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In December 2025, the U.S. Postal Service (USPS) issued a final rule changing how postmarks are applied and understood. While mail filing procedures themselves have not changed, the update changes the understanding of what a postmark is and what they actually represent—an important distinction for anyone submitting time-sensitive immigration filings.

What Changed

Under the new USPS rule (effective December 24, 2025), a postmark no longer reflects the date mail was physically handed to USPS. Instead, it reflects when the item enters automated processing within the postal system.

As USPS modernizes and consolidates its processing operations, the timing gap between mailing and postmarking may become more common and should be taken into consideration when submitting time-sensitive mail.

Why This Matters

A postmark was often used as proof of mailing date in legal and administrative contexts. However, USPS clarified that:

• Postmarks now may not reflect the actual date of drop-off;
• Printed postage dates (from kiosks or online systems) only show when postage was generated; and
• The physical receipt date is not guaranteed by the postmark alone.

This distinction is especially important for immigration filings and other time-sensitive submissions.

USCIS Filing Rule Still Applies

For immigration purposes, USCIS continues to rely on the receipt date, not the postmark date, to determine:

• Filing deadlines;
• Priority dates;
• Eligibility under visa caps; and
• Timely submissions for RFEs, NOIDs, and appeals.

This means the official filing date of a case is to be considered by when USCIS or a Lockbox facility physically receives the application.

How to Protect Your Filing

To reduce the risk of delays or disputes, practitioners and applicants are advised to:

• File as early as possible, whenever possible;
• Use Certified Mail, Registered Mail, or Certificates of Mailing to establish a paper-trail;
• Consider commercial couriers like FedEx or UPS for clearer tracking;
• Keep all proof of mailing and delivery records; and
• Visit a post office for manual processing when timing is critical.

Key Takeaway

USPS postmark rules have been updated to reflect internal processing changes, not mailing intent. For immigration filings, USCIS receipt date remains the controlling factor—making mailing method and timing more important than ever.

To discuss how mailing procedures or USCIS filing requirements may affect your case, you may schedule a consultation with the Law Office of Jacqueline Lentini, LLC by calling 630-262-1435 or emailing jacki@lentinivisas.com.