Make a shipping adjustment Make a shipping adjustment
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Make a shipping adjustment

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You can update shipment details after a sale or giveaway, so your label matches the package you’re sending.

If the label doesn’t match the shipment, the package may be refused, delayed, or charged additional postage.

Most shipping settings are set before the sale. Shipping adjustments are meant for the occasional fix, not as a replacement for accurate shipping setup. 

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What counts as a shipping adjustment

A shipping adjustment is any change you make to shipment details after a buyer makes a purchase or you run a giveaway.

This includes:

  • Changing package weight or dimensions

  • Bundling multiple purchases into one shipment

  • Unbundling items so they ship separately

  • Switching shipping services (U.S. only)

  • Adding extras, like insurance or signature confirmation (U.S. only)

Note: Keep your shipping settings and shipping profiles accurate before you sell. Repeated issues with inaccurate shipping details may result in account action.

When you can make shipping adjustments

Whether a shipping adjustment is supported depends on both the type of change and when you make it:

  • Before generating a label, you can:

    • Bundle items into one shipment

  • Before dropping off the package, you can: 

    • Change weight or dimensions

    • Switch shipping services (if supported)

  • Before the original package is marked in transit, you can:

    • Unbundle items into separate shipments

Need to change something else? Change or fix your shipping label.

How to make a shipping adjustment

You can only make shipping adjustments from your seller Hub on whatnot.com. You can't adjust labels in the app.

To make a shipping adjustment:

  1. From whatnot.com, click your account icon in the top right.
  2. Under the Selling tab, open Seller Hub. 
  3. On the left, open the Shipments page. 
  4. Find and select the shipment you want to edit. 
  5. On the right, click Edit Shipping Details (before generating a label) or Generate New Label.
  6. Update the shipment details. 
  7. Scroll down to Shipping Costs > Pending Adjustments to review any added costs.
  8. Click Save (if you haven’t created a label) or Generate New Label. 

After your update:

  • If no label existed, Whatnot generates one that reflects the changes.
  • If a label existed, it’s voided and replaced with a new one. Always use the new label to avoid delivery or payout issues. 

Need more help with bundling? Learn how to bundle or unbundle shipments.

How much shipping adjustments cost

Shipping costs are charged at the time of sale. If you change shipment details later, the label cost may change.

  • Some adjustments are always free

  • Some are free up to 5 times per week (label adjustment allowance) 

  • Some always result in a charge

If your new label costs more, the difference is charged to your account balance and shown in your ledger.

If the shipping adjustment costs less, Whatnot won’t issue a refund.

We’ll show you whether an adjustment is free or has a cost before you save your changes.

Shipping adjustment rules by region

Adjustment types and costs can vary depending on where you're shipping from.

For sellers in the US

Always free

These adjustments are always free unless Whatnot identifies abuse:

  • Weight changes within the same USPS pricing tier
    • Under 1 lb: e.g. 4 oz → 8 oz (Ground Advantage or Priority Mail)
    • Between 1–5 lbs: e.g. 2 lb → 4 lb
  • Weight changes for Flat Rate Boxes, if Flat Rate was applied before the sale or show (e.g. 3 lb → 15 lb still ships Flat Rate)
  • Bundling shipments, when the combined label cost is less than two separate ones

Free up to 5 per week

You can make up to 5 of these adjustments for free each week. Your free allowance resets every Sunday at 7 PM ET.

After that, you’ll be charged the cost difference for each additional adjustment.

  • Weight increases across tiers:
    • From under 1 lb → 1–5 lbs (e.g. 4 oz → 2 lb)
    • From 1–5 lbs → over 5 lbs (up to 5 lb increase, e.g. 2 lb → 6 lb)
    • From over 5 lbs → higher weight (up to 5 lb increase, e.g. 7 lb → 10 lb)
  • Unbundling shipments, when the cost of separate labels is higher than the original bundled label
  • Increasing dimensions to:
    • Over 1 cubic foot (1,728 in³)
    • Any dimension over 22 inches
  • Opting out of Flat Rate, if Flat Rate was applied before the sale or show
    e.g. switching from a 6 lb Flat Rate label to a 6 lb Ground Advantage label
  • Seller-initiated upgrade from First-Class Mail Letter (FCML) to Ground Advantage or Priority Mail

Always charged

These changes are not eligible for free adjustments:

  • Adding shipping extras, like insurance or signature confirmation
  • Weight increases over 5 lbs in a single adjustment (e.g. 3 lb → 10 lb or 7 lb → 13 lb)
  • Weight changes from under 1 lb to over 5 lbs (e.g. 4 oz → 6 lb)
  • Increasing dimensions to over 2 cubic feet
For sellers outside the US

You can make up to 5 free shipping adjustments per week. This free allowance resets every Monday at 12:01 AM UTC.

After you use your free adjustments, you’ll be charged the difference for any adjustments that increase the cost of shipping.

What counts as an adjustment:

  • Increasing the weight or size of a shipment after the sale
  • Switching to a more expensive shipping service

This applies to both domestic and international shipments.

Check how many free adjustments you have

To check your remaining free adjustments:

  1. On whatnot.com, open the Shipments page inSeller Hub
  2. Open the sidebar
  3. Check your Label Adjustment Allowance.

Tips for avoiding adjustments

Most adjustments can be avoided by setting accurate shipping details up front:

  • Weigh your items before listing (including packaging)
  • Choose accurate shipping profiles for each product
  • Use custom profiles for repeat items or bundling control
  • Double-check your default shipping settings before listing products or going live

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