Explained

How UPS SurePost Hand-Offs Work

SurePost is cheaper because UPS only handles the heavy lifting. The last mile belongs to USPS, which creates tracking gaps.

Two Tracking Numbers

• The UPS label is primary. It shows progress until the package reaches the destination USPS facility.
• The “Postal ID” (22 digits) starts with 9274 and is used by USPS after the hand-off. Give this number to buyers so they can track on USPS.com.

Why Tracking Stalls

• UPS scans “Tendered to USPS” but the next scan depends on when the local post office processes the sack. That can take 24–48 hours.
• Weekends and holidays stretch the delay because USPS doesn’t always unload SurePost trailers on Sunday.

When to Escalate

• If USPS doesn’t show a scan 3 days after UPS says “Tendered,” call UPS SurePost support—they can ping the destination depot.
• Confirm the buyer’s mailbox accepts packages. USPS treats SurePost like regular mail, so locked parcel boxes or insufficient parcel lockers cause returns.

Set Expectations Up Front

Add a line in your shipping policy: “SurePost starts with UPS and finishes with USPS. Tracking may be quiet for a day or two while the hand-off occurs.” This single sentence kills most “Did you ship it?” tickets.