Change or fix your shipping label Change or fix your shipping label
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Change or fix your shipping label

Whatnot Support Whatnot Support

If details about your shipping label are incorrect (for example, the weight, label size, or return address), you can usually fix it yourself in Seller Hub. What you can edit depends on the shipment status and whether the label’s already been generated.

On this page: 

Getting an error message while generating a label? Go to troubleshoot label generation errors instead. 

Check if the label is already generated

To check if you’ve generated the shipping label: 

  1. From whatnot.com, go to Shipments in Seller Hub.
  2. Check the shipment status for that order: 
    • Needs Label → label not yet generated
    • Ready to Ship → label already generated

Use this information to check which label details you can change and when. 

What you can change 

Here’s a quick overview of what you can change in Seller Hub and when. Detailed guidance follows below.

Label detail Before label generation After label generation Last chance to edit
Your return address ✅ Yes ❌ No Until label generation
Buyer's address ❌ No ❌ No - 
Label or packing slip size ✅ Yes ✅ Yes (one label at a time) Until drop-off
Weight or dimensions ✅ Yes ✅ Yes Until drop-off
Bundling ✅ Yes ❌ No Until label generation
Unbundling ✅ Yes ✅ Yes  Until original shipment is marked in transit
Shipping service ⚠️ Sometimes ⚠️ Sometimes Until drop-off

Note: All steps in this article apply to Seller Hub on web (whatnot.com). These actions aren’t available in the mobile app.

Update your return address

Before label generation:

  1. From the Shipments page, open the Sidebar.
  2. Under Default Label Options, update your Return Address.
  3. Generate your labels.

After label generation:

You can’t change the return address for labels that have already been generated. When you update your return address it only applies to future labels.

If you need the return address changed for a specific shipment, contact Support.

Fix an incorrect buyer address

Sellers can’t update buyer addresses.

To correct the address and generate a new label, contact Support.

Change your label or packing slip size

Before label generation:

  1. From the Shipments page, open the Sidebar.
  2. Under Default Label Options, edit your label or packing slip size.
  3. Generate your labels.

After label generation:

If you've already generated your label(s), you can still update the size and regenerate.

Note: Labels can only be regenerated one at a time, not in bulk.
  1. From the Shipments page, open the Sidebar.
  2. Under Default Label Options, update your label or packing slip size.
  3. Save your changes.
  4. Find the shipment and tap the pencil icon to edit.
  5. Scroll down and select Save Changes to regenerate the label in the new size.
Correct weight or dimensions

You can correct weight or dimensions before or after generating the label.

  1. From the Shipments page, find and click the shipment.
  2. Select Edit Shipping Details (before label generation) or Generate New Label.
  3. Update the weight and/or dimensions.
  4. Review updated costs under Shipping Costs → Pending Adjustments.
  5. Select Save or Generate New Label.

Learn more about shipping adjustments.

Bundle or unbundle items

Bundle items

  • Before label generation: You can bundle items into one shipment → How to bundle.
  • After label generation: Bundles can’t be changed. Ship items separately.

Unbundle items

  • Before label generation: You can remove items from a bundle → How to unbundle.
  • After label generation (until the original shipment is in transit): You can unbundle items to create new shipments and labels → How to unbundle.
Change the shipping service

Most shipping services are determined by your show's shipping settings and the item’s shipping profile. In many cases, the service cannot be changed after the item is sold.

In some situations, you may be able to update the service after a sale, typically by adjusting the package weight or selecting another eligible option (such as USPS Flat Rate).

To update the shipping service:

  1. Open the shipment from your Shipments page.
  2. Select Edit Shipping Details (before label generation) or Generate New Label.
  3. Update the weight to change the service, or select another eligible service (e.g. USPS Flat Rate).
  4. Review changes under Shipping Costs → Pending Adjustments.
  5. Select Save or Generate New Label.

Note: Some services can’t be applied after the item sells, including USPS First-Class Mail Letter and Free Pickup.

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