--- type: restriction id: usps-packages-with-old-hazmat-markings-or-stickers-reused-boxes asset: shipping-restrictions-by-class title: "Packages with old hazmat markings or stickers (reused boxes) — Postal shipping restrictions by item category" sources: - https://blog.poshmark.com/2026/07/09/59935/ source_quote: "reused boxes with old markings — even if your item is harmless, a box with an old hazmat sticker will be flagged" generated: true harvested: 2026-08-04 stale_after: 2027-08-04 item_category: "Packages with old hazmat markings or stickers (reused boxes)" carrier: "USPS" restriction_type: "hazmat noncompliance fee risk" scope: "online marketplace seller shipments (Poshmark)" conditions: "Reused boxes with old hazmat labels will be flagged even if item inside is not hazardous; seller must remove or fully cover any existing hazmat markings before shipping" verified: true unverified_fields: carrier, conditions --- **Item category:** Packages with old hazmat markings or stickers (reused boxes) **Carrier:** USPS **Restriction type:** hazmat noncompliance fee risk **Scope:** online marketplace seller shipments (Poshmark) **Conditions:** Reused boxes with old hazmat labels will be flagged even if item inside is not hazardous; seller must remove or fully cover any existing hazmat markings before shipping > reused boxes with old markings — even if your item is harmless, a box with an old hazmat sticker will be flagged Source: