Each carrier publishes refund and void deadlines instead of a use-by date. The rules cited here were read on 2026-07-27.
What a new label ran on 2026-07-27 — Newark, NJ 07102 to Atlanta, GA 30303
Context for the expiry question: a current 1 lb box, 10 × 8 × 4 inches, quoted the day this page was written. When an old label’s status is murky, rebuying is often cheaper than the detective work.
| Carrier | Service | Price | Quoted window |
|---|---|---|---|
| USPS | Ground Advantage | $9.91 | 6-7 business days |
| UPS | Ground | $10.31 | 3-4 business days |
| USPS | Priority Mail | $14.49 | 4-5 business days |
| UPS | 3 Day Select | $15.13 | 3-4 business days |
| UPS | 2nd Day Air | $16.58 | 2-3 business days |
Rates also get refiled during the year, so a price locked months back stops matching what the same service costs today. That cuts both ways, and it is one more argument against sitting on labels you have already bought.
USPS: a 30-day refund clock
Per the refunds page at usps.com, checked 2026-07-27, a Click-N-Ship label the postage system has never scanned can be refunded within 30 days of its print date, and from 30 to 60 days the request goes through the Click-N-Ship help desk by email. USPS names no date after which an unused label stops being accepted, so the refund window is the deadline that actually bites.
UPS: void windows with a hard stop
Per ups.com, checked 2026-07-27, you can void a UPS shipment yourself within 90 days of creating the label, must ask UPS to do it between 90 and 180 days, and after 180 days a void will not be processed at all. UPS likewise stops short of naming a day the label itself dies.
FedEx: printed outlives emailed
The FedEx shipping FAQ at fedex.com, checked 2026-07-27, states that a print return label carries no expiration date while its account remains in good standing, and that an email return label can stay retrievable for up to two years from the request. Those statements cover return labels; for ordinary one-way labels we found no published window, so treat freshness as the safe default.
Return label or outbound label: same countdown, or different?
“Do shipping labels expire” hides a second question once you add the carrier: does a return label run on its own clock, separate from an outbound one? Checked carrier by carrier, with the return case called out wherever the carrier calls it out.
USPS
No separate rule. The same 30-day self-service refund window, and the 60-day total window once the Click-N-Ship help desk takes over after day 30, apply to any unscanned Click-N-Ship label, outbound or return — per usps.com, checked 2026-08-27.
UPS
Same story. UPS's void-a-shipment page and its how-to-return-a-package page, both checked 2026-08-27, apply the identical 90-day self-service window and 180-day hard stop to any UPS-created label. Neither page carves out a separate timer for a return label, so a return label expires exactly when any other UPS label would.
FedEx
FedEx is the one carrier that draws the line. Per fedex.com, checked 2026-07-27: a printed return label keeps working for as long as the account that created it stays in good standing, and an emailed return label stays retrievable for up to two years before it is printed. For an ordinary outbound label, FedEx publishes no matching window in the pages we checked — which is itself the answer to how long a regular FedEx label is good for: there is no stated shelf life, so print it close to your ship date rather than banking it for later.
Label age questions
Can I still use a label I printed weeks ago?
Often yes, since none of the three big carriers publishes a firm use-by date for a paid, unused label. You fall outside the USPS refund window after 30 days though, and outside every UPS void option after 180, so waiting quietly shrinks your fallbacks.
Can I get a refund on a label I never used?
USPS allows it within 30 days of printing for labels that were never scanned, per usps.com. UPS voids run out at 180 days. On our side, the terms say unused labels may be eligible for carrier void or postage refund only when the selected carrier allows it, and carrier decisions take time.
Does the ship date printed on a label matter?
Carriers pull the operative data from the barcode at the first scan, and none of the pages we checked ties acceptance to the printed date. Where the date really counts is refund math, which starts at label creation or printing.
What if my SMKlog label fails to generate at all?
Our terms cover that case head-on: we review the order and either issue the label, ask for corrected information, or refund the label payment when no label can be provided.
Do UPS labels expire, including return labels?
Not on a separate clock. UPS's void-a-shipment page and its how-to-return-a-package page, both checked 2026-08-27, apply the same 90-day self-service window and 180-day hard stop to a return label as to any other UPS-created label. Neither page treats a return label as a special case.
How long are FedEx labels good for?
It depends which kind. A printed FedEx return label keeps working while the account behind it stays in good standing, and an emailed one is retrievable for up to two years before printing, per fedex.com checked 2026-07-27. For an ordinary outbound label, FedEx publishes no matching window in the pages we checked, so there is no number to give: treat the label as fresh-is-best rather than something to bank for later.