Return Merchandise Authorization (RMA): How Amazon Returns Work

Published: February 27, 2017
Last updated: May 01, 2026

A Return Merchandise Authorization (RMA) is a unique identifier that Amazon assigns to each return request. The RMA number tracks the return from initiation through resolution - whether the outcome is a refund, replacement, or restocking of the item.

While the original RMA process required sellers to manually review and approve each return, Amazon has significantly automated the system. FBA returns are now fully automated, and FBM sellers are enrolled in auto-authorization programs by default.

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Table of Contents

1. What Is an RMA Number?
2. How FBA Returns Work
3. How FBM Returns Work
4. Auto-Authorization Settings
5. Manual Return Authorization
6. Returnless Refunds
7. Managing Returns in Seller Central
8. Prepaid Return Labels
9. Restocking Fees
10. FAQs

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What Is an RMA Number?

The RMA number is a unique code assigned to each return transaction on Amazon. It serves as the tracking identifier throughout the return process and appears in:

• The Return Merchandise Authorization itself
• The Return Mailing Label sent to the buyer
• The seller’s Manage Returns section in Seller Central

Each return - whether initiated by the buyer or the seller - receives its own RMA number. Sellers can use Amazon’s auto-generated RMA number or enter a custom RMA number for their own tracking purposes.

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How FBA Returns Work

For Fulfillment by Amazon orders, the return process is fully automated. Sellers do not need to review, approve, or take any action on FBA returns.

The Process

1. Buyer initiates return through their Amazon account
2. Amazon auto-approves the return if it falls within the return window
3. Amazon generates the RMA number and provides the buyer with a prepaid return label
4. Buyer ships the item back to an Amazon fulfillment center
5. Amazon receives and inspects the returned item
6. Amazon processes the refund to the buyer
7. Item is classified as sellable (returned to your inventory) or unsellable (eligible for removal or disposal)

What FBA Sellers See

FBA sellers do not interact with RMA numbers directly. Instead, you monitor return outcomes through:

• FBA Returns reports - shows each return with reason, status, and disposition
• Manage FBA Returns in Seller Central - view return details and item condition
• Reimbursement reports - if Amazon lost or damaged a returned item, you may receive a reimbursement (at manufacturing/sourcing cost, not retail price)

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How FBM Returns Work

For seller-fulfilled orders, the return process is semi-automated. Amazon handles the initial buyer-facing steps, but sellers have configurable control over authorization.

The Process

1. Buyer requests a return through their Amazon account
2. Amazon evaluates the request against the return policy
3. Return is auto-authorized or queued for seller review (depending on your settings)
4. Amazon generates the RMA number and provides the buyer with a prepaid return label
5. Buyer ships the item to the seller’s return address
6. Seller receives, inspects, and processes the return
7. Seller issues the refund through Seller Central

Key Differences From FBA

• You receive and inspect returned items - not Amazon
• You process refunds - Amazon does not auto-refund FBM returns (except in some auto-authorization scenarios)
• You can apply restocking fees for certain return types when manually authorizing
• You handle the customer communication if issues arise

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Auto-Authorization Settings

Professional sellers are automatically enrolled in Amazon’s return auto-authorization programs. You can configure how returns are handled in Seller Central under Settings > Return Settings.

Available Options

Setting	What It Does
Auto-authorize within Amazon policy + prepaid label	Returns within Amazon’s standard return window (30 days) are automatically approved with a prepaid label sent to the buyer
Auto-authorize all returns + prepaid label	All return requests are automatically approved regardless of timing
Auto-authorize with extended window + prepaid label	Returns are auto-approved even beyond the standard 30-day window

Why Auto-Authorization Matters

• 24-hour deadline - if you do not respond to a return request within 24 hours, Amazon may authorize it on your behalf
• Consistency - auto-authorization ensures buyers receive a prompt response, which protects your metrics
• Reduced workload - for high-volume sellers, manually reviewing every return is impractical

Auto-authorization is the default for Professional sellers. You can adjust these settings, but Amazon recommends leaving auto-authorization enabled.

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Manual Return Authorization

Some returns still require manual seller review. These include:

• Returns outside Amazon’s standard policy window
• Returns on category-exempt products
• Returns where the buyer’s stated reason does not match Amazon’s auto-approval criteria

How to Manually Authorize

1. Go to Orders > Manage Returns in Seller Central
2. Check the Pending Actions tab
3. Select the return request to review
4. Choose to Authorize, Close, or Issue Refund
5. Enter the RMA number (Amazon’s or your custom number)
6. Optionally apply a restocking fee

Custom RMA Numbers

For manual authorizations, you can replace Amazon’s auto-generated RMA number with your own custom RMA number. This is useful if you use a separate returns management system that requires its own tracking codes.

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Returnless Refunds

Amazon offers a returnless refund option where the buyer receives a refund without shipping the item back. This applies in specific situations:

• Low-value items - when the cost of return shipping exceeds the item’s value
• Seller-configured thresholds - you can set a dollar amount below which returns are processed as returnless
• Amazon discretion - Amazon may issue returnless refunds for certain categories or situations

Setting Up Returnless Refunds

In Seller Central, go to Settings > Return Settings > Returnless Resolutions. You can set rules based on:

• Price thresholds (e.g., refund without return for items under $15)
• Specific return reasons
• Product categories

Returnless refunds reduce your return processing costs and eliminate the risk of receiving unsellable returned merchandise. They also improve the buyer experience, which can positively affect your seller metrics.

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Managing Returns in Seller Central

All return activity is managed through Orders > Manage Returns in Seller Central.

Key Sections

• Pending Actions - returns awaiting your manual review
• Authorized - returns you have approved, awaiting buyer shipment
• Completed - fully processed returns
• Closed - returns that were denied or cancelled

FBA Returns

FBA sellers access return data through Manage FBA Returns in the Reports section. This shows:

• Return reason
• Item disposition (sellable, damaged, customer-damaged, defective)
• Reimbursement status

Reports to Monitor

• Returns Report - all return requests and their statuses
• Return Reason Report - aggregates return reasons to help you identify product issues
• Reimbursements Report - tracks Amazon’s payments for lost or damaged FBA inventory

Monitoring return data helps you identify products with high return rates, common quality issues, and potential listing problems.

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Prepaid Return Labels

Since February 2026, all seller-fulfilled orders require prepaid return labels. This is part of Amazon’s broader push to standardize the return experience across FBA and FBM.

How It Works

• Amazon generates prepaid return labels for FBM returns
• The cost of the return label is deducted from the seller’s account
• Professional sellers are automatically enrolled in the Prepaid Return Label Program
• Sellers cannot opt out

Cost Impact

Prepaid return labels add a direct per-return cost to FBM sellers that did not exist before. Factor this into your pricing strategy and margin calculations, especially for products with higher return rates.

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Restocking Fees

For manually authorized FBM returns, sellers can apply restocking fees in certain situations:

Condition	Allowed Restocking Fee
Item returned in original condition, within return window	No restocking fee
Item opened but in sellable condition	Up to 20%
Item materially different from listing or damaged by buyer	Up to 50%
Item returned after 30-day window (if you accept late returns)	Up to 20%

Restocking fees are only available on manually authorized returns. Auto-authorized returns do not allow restocking fees.

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FAQs

Do I need to manually approve every return?

No. Most returns are now auto-authorized. FBA returns are fully automated - sellers take no action. FBM returns default to auto-authorization for Professional sellers. Manual review is only required for out-of-policy or exception cases.

What is the difference between FBA and FBM returns?

FBA returns are handled entirely by Amazon - the buyer ships to Amazon, Amazon inspects, refunds, and either restocks or disposes of the item. FBM returns are received by the seller, who inspects and processes the refund.

Can I use my own RMA number?

Yes. When manually authorizing an FBM return, you can replace Amazon’s auto-generated RMA number with a custom number. This is useful for sellers with independent returns management systems.

What are returnless refunds?

Returnless refunds allow you to issue a refund without requiring the buyer to ship the item back. This is useful for low-value items where return shipping costs exceed the product value. You can configure thresholds in Seller Central.

How long do buyers have to return items?

Amazon’s standard return window is 30 days from delivery. Extended return windows apply during the holiday season (typically mid-November through January 31). Some categories have different return policies.

What happens if I don’t respond to a return request within 24 hours?

Amazon may auto-authorize the return on your behalf. Consistently failing to respond to return requests within 24 hours negatively affects your seller performance metrics.

How are FBA reimbursements calculated?

Since March 2025, FBA reimbursements for lost or damaged inventory are based on your manufacturing or sourcing cost, not the retail selling price. The claims window has been reduced from 18 months to 2 months.

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Summary

The Amazon RMA process has evolved from a manual seller-controlled workflow to a largely automated system:

• RMA numbers uniquely identify each return transaction and appear on authorization records, return labels, and Manage Returns in Seller Central
• FBA returns are fully automated - Amazon handles everything, sellers monitor outcomes via reports
• FBM returns are semi-automated - Professional sellers are auto-enrolled in prepaid return label and auto-authorization programs
• Auto-authorization is the default - manual review is only for exceptions
• Returnless refunds allow refunds without physical returns for low-value items
• Prepaid return labels are mandatory for all FBM orders since February 2026
• Restocking fees (up to 50%) are available on manually authorized FBM returns
• FBA reimbursements are now calculated at manufacturing cost, not retail (since March 2025)