Barcode Label Unreadable and Replaced — What This Shipping Notice Means

Seeing an unfamiliar tracking update like "barcode label unreadable and replaced" can be alarming — it sounds like something went wrong with your package. In most cases, it's a routine, automated step in a carrier's sorting process, not a sign of damage or loss.

Quick Answer

"Barcode label unreadable and replaced" means a shipping carrier's scanner couldn't read the original barcode on your package — usually due to damage, poor print quality, or a torn label — so a facility worker or an automated system generated and applied a new label with a readable barcode encoding the same tracking number. It's a recovery step, not typically a sign your package is lost.

Why This Notice Appears

Large carriers like FedEx, UPS, and USPS route millions of packages a day through automated sorting facilities that rely entirely on barcode scanners to direct each package to the right truck, plane, or delivery route. When a scanner can't read a barcode — for any of the reasons covered in why barcodes get damaged or unreadable — the package can't move through automated sorting until it's fixed.

Rather than let an unscannable package sit, most carriers have a process to pull it aside, look up the shipment by whatever information is still legible (an order number, a partial barcode, or manual entry), print a new label with a fresh, scannable barcode encoding the same tracking number, and apply it to the package so it can re-enter the normal sorting flow.

What Usually Causes This

• Torn or creased labels from rough handling during transit

• Faded thermal print — many shipping labels use thermal printing, which fades with heat or friction

• Labels that got wet, smudging the ink

• Labels applied over a seam, tape, or curved surface, distorting the bar widths

• A second label or piece of tape accidentally covering part of the barcode

Does This Affect Delivery?

For most shipments, a barcode relabel is a same-day recovery step that adds little or no delay — the tracking number itself doesn't change, only the physical label. If tracking shows no further movement for more than a day or two after this notice, that's worth following up on with the carrier directly, since a stalled scan can occasionally indicate a package that needs manual attention beyond just relabeling.

This notice is specific to the physical label on the package, not the account or order it belongs to — it doesn't mean the wrong item was shipped, and it doesn't require any action from the recipient.

If You're the One Shipping the Package

If you print your own shipping labels and want to avoid this issue in the first place, the two most common preventable causes are low print resolution and labels printed too small for the barcode format. If you're generating your own barcodes for shipments or internal tracking, the Barcode Generator creates CODE128 barcodes (the standard format used by FedEx, UPS, and USPS for tracking numbers) at print-ready resolution, free.

Related Tools

• Barcode Generator — Generate CODE128, EAN-13, UPC-A, CODE39, and ITF barcodes as PNG or SVG

• QR Code Generator — Create static QR codes for URLs, WiFi, contact cards, and more

Read more on why barcodes get damaged or unreadable for the physical causes behind this notice. The full Generator Tools category has every barcode and QR tool in one place.

FAQ

Is "barcode label unreadable and replaced" the same as a shipment exception?

They're related but not identical. A shipment exception is a broader tracking status that covers many kinds of delays or issues. A barcode relabel is one specific, usually minor cause of an exception — the package itself is typically fine, and the exception clears once the new label is scanned successfully.

Does this mean my package was damaged?

Not necessarily. The label can become unreadable without any damage to the contents inside — a smudged, torn, or poorly printed label is a packaging-and-printing issue, separate from the condition of what's inside the box.

Will I be notified if this happens to my package?

Carriers vary in how visible this status is. Some show it directly as a tracking event ("barcode label unreadable and replaced" or similar wording); others fold it into a general "in transit" update without calling it out. If you're tracking closely and see an unusual gap in scan events, this is one common explanation.

What should I do if tracking hasn't updated in several days after this notice?

Contact the carrier directly with your tracking number. In most cases the relabel resolves within the same sorting cycle, so a longer gap is worth asking about — carriers can look up the shipment internally even without a working barcode.

Can I prevent this when shipping my own packages?

Print shipping labels at 300 DPI or higher, avoid applying labels over tape, seams, or curved surfaces, and keep the barcode's quiet zone (the blank margin on either side) clear of other markings. These cover most of the preventable causes.

Generate a Reliable Shipping Barcode

If you print your own shipping or tracking labels, the Barcode Generator creates print-ready CODE128 barcodes free, with no account required — download at 300 DPI to avoid the print-quality issues that most often lead to a barcode being flagged as unreadable.