Shipping adjustments let you update shipment details so your label matches the package you’re sending after a sale or giveaway and before you hand it off to the carrier.
Most shipping settings are set before the sale, but adjustments let you update details if something changes. If the shipping label doesn't match the shipment, the package may be refused, delayed, or charged additional postage.
From the Shipments page in Seller Hub, you can edit certain shipment details, such as package weight, bundled items, or shipping service. For a full list of options, check what counts as a shipping adjustment.
Accurate shipment details help avoid delivery issues and keep your account in good standing. Repeated issues with incorrect shipment details may result in account action under Whatnot’s What Actions We Take policy.
On this page:
- What counts as a shipping adjustment
- When you can make shipping adjustments
- How to make a shipping adjustment
- How much shipping adjustments cost
- Check how many free adjustments you have
- Tips for avoiding adjustments
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.
You may need to make a shipping adjustment if:
- The weight or size of the package changed
- You need to unbundle items so they ship separately
- You’re bundling multiple purchases into one shipment
- You want to switch shipping service (e.g. from USPS Ground Advantage to Flat Rate)
- You need to add extras, like insurance or signature confirmation
When you can make shipping adjustments
Adjustments depend on timing and the type of change. Some changes can be made right up until you drop off the package, while others have earlier cut-offs or aren’t supported.
Check what’s allowed and when:
Bundle items into one shipment: Before you generate the label
Unbundle items into separate shipments: Before the original package is marked in transit
Change weight and dimensions: Before you drop off the package
Switch shipping service: Before you drop off the package, but only if the change is supported. For example, you can't switch to USPS First-Class Mail Letter or Free Pickup, but you can change to USPS Flat Rate after a sale.
Need to change something else? See Fix label issues.
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:
- Sign in to whatnot.com
- Click your profile icon
- Under the Selling tab, open Seller Hub
- On the left, open the Shipments page
- Find and select the shipment you want to edit
- On the right, click Edit Shipping Details (before generating a label) or Generate New Label
- Update the shipment details
- Scroll down to Shipping Costs > Pending Adjustments to review any added costs
- 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 on, the cost of the label may change:
- Some adjustments are always free
- Some are free up to 5 times per week (check shipping adjustments by region to see what time your label adjustment allowance resets)
- 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 if the shipping adjustment is free or if there’s a cost before you save your changes. Here's an example:
Shipping adjustments 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:
- On whatnot.com, open the Shipments page inSeller Hub
- Open the sidebar
- 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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Articles in this section
- Pack and ship your order
- Packaging Guidelines
- Make a shipping adjustment
- Bundle or unbundle shipments
- Manage your default label options (label size, return address)
- Generate and print shipping labels
- Change or fix your shipping label
- Troubleshoot label generation error messages
- Export livestream report
- About shipment statuses in Seller Hub