Step-by-Step: What Happens When a Chargeback Is Filed 

1️⃣ Cardholder Disputes the Charge 

The issuing bank accepts the dispute and assigns a reason code. 

2️⃣ Funds Are Removed 

The transaction amount plus a chargeback fee is debited from the merchant account. 

3️⃣ Merchant Notification 

The acquiring bank or processor notifies the merchant. 

4️⃣ Representment 

The merchant gathers and submits evidence proving the transaction was valid. 

5️⃣ Issuer Review 

The issuing bank evaluates the evidence and makes a decision. 

6️⃣ Possible Escalation 

If either party challenges the decision, the case may move to: 

• Pre-arbitration 

• Arbitration (final network decision) 

Most disputes are resolved at the issuing bank level. 

 

Who Actually Decides Who Wins? 

This is widely misunderstood. 

The issuing bank decides most chargebacks. 

Visa, Mastercard, Discover, and American Express create the rules — but they do not review every case. 

Only if the dispute escalates to arbitration does the card network make a final ruling. 

That’s why documentation and compliance matter more than merchants realize. 

 

What Merchants Must Do Immediately 

When you receive a chargeback notice: 

✔ Identify the reason code 
✔ Review transaction details 
✔ Collect proof of authorization 
✔ Provide delivery confirmation (if applicable) 
✔ Include refund/cancellation policy 
✔ Submit within the deadline (typically 7–21 days) 

Miss the deadline and you automatically lose. 

 

Why Chargebacks Are So Complex 

Chargebacks are complicated because: 

• Each network has different rules. 

• Evidence requirements vary by reason code. 

• Deadlines are short. 

• High ratios trigger monitoring programs. 

• Poor website disclosures weaken defense. 

For e-commerce merchants, compliance begins long before the dispute happens. 

 

Visa Chargeback Reason Codes (Common Categories) 

Fraud 

• 10.4 – Fraud, Card Absent Environment 

• 10.5 – Fraud, Card Present Environment 

Authorization 

• 11.3 – No Authorization 

• 11.4 – No Authorization (Card Absent) 

Processing Errors 

• 12.6 – Duplicate Processing 

• 12.7 – Invalid Data 

Consumer Disputes 

• 13.3 – Not as Described 

• 13.5 – No Show / Cancellation 

• 13.8 – No Authorization / Cancelled Recurring 

 

Mastercard Chargeback Reason Codes (Common) 

Fraud 

• 4837 – No Cardholder Authorization 

Authorization 

• 4808 – No Authorization 

Processing Errors 

• 4834 – Duplicate Processing 

Cardholder Disputes 

• 4855 – Credit Not Processed 

• 4841 – Cancelled Recurring 

 

American Express Dispute Categories 

Amex refers to disputes as “Inquiries” or “Chargebacks.” 

Common categories: 

• Fraud / No Cardmember Authorization 

• Goods/Services Not Received 

• Not as Described 

• No Show or Cancellation 

• Credit Not Processed 

Amex often has shorter response windows. 

 

Discover Chargeback Reason Codes (Common) 

Fraud 

• UA01 – Fraud Card Not Present 

• UA02 – Fraud Card Present 

Authorization 

• UA05 – No Authorization 

Processing Errors 

• DP – Duplicate Processing 

Consumer Disputes 

• RG – No Show 

• RM – Credit Not Processed 

 

The Real Cost of Chargebacks 

Chargebacks cost more than the transaction amount: 

• Chargeback fee 

• Operational time 

• Lost merchandise 

• Higher monitoring risk 

• Potential fines 

• Possible account termination 

High dispute ratios can place merchants into monitoring programs. 

 

Understanding Visa’s VAMP (Visa Acquirer Monitoring Program) 

VAMP is Visa’s system for monitoring: 

• Chargeback ratios 

• Fraud rates 

• Dispute activity 

If your ratio exceeds Visa’s thresholds, you may enter a monitoring program. 

That can result in: 

• Monthly fines 

• Increased processing costs 

• Mandatory remediation plans 

• Account termination 

VAMP is enforced at the network level — not just by your processor. 

 

What Is RDR (Rapid Dispute Resolution)? 

RDR is a Visa program that allows merchants to automatically refund transactions before they become formal chargebacks. 

When a cardholder contacts their bank: 

• An alert is generated. 

• The merchant can automatically issue a refund. 

• The case does not become a chargeback. 

• The dispute does not impact monitoring ratios. 

RDR is especially important for: 

• High-risk merchants 

• High-volume e-commerce sellers 

• Subscription businesses 

• Digital product sellers 

Prevention is far less expensive than representment. 

 

Why High-Risk & High-Volume Merchants Must Use RDR 

If you process large online volume: 

• Small dispute increases amplify ratios. 

• Subscription billing raises recurring risk. 

• Fraud attempts are more frequent. 

Using RDR and alert tools helps merchants: 

✔ Refund low-dollar disputes automatically 
✔ Prevent VAMP violations 
✔ Lower chargeback ratios 
✔ Protect long-term account stability 

Ignoring alerts can quickly push a merchant into a monitoring program. 

 

Website & Policy Compliance: Your First Line of Defense 

Winning chargebacks often depends on: 

• Clear refund policy 

• Transparent cancellation terms 

• Accurate product descriptions 

• Shipping timelines 

• Customer service contact visibility 

• Clean billing descriptor 

Banks review patterns. 

Weak websites create weak defenses. 

 

How Nationwide Payment Systems Supports Merchants 

Nationwide Payment Systems works with merchants proactively — not just when disputes happen. 

When you partner with Nationwide Payment Systems: 

✔ We review your website for compliance risk 
✔ We help structure refund and cancellation policies 
✔ We assist with representment strategy 
✔ We help implement RDR where appropriate 
✔ We offer chargeback alert tools 
✔ We monitor dispute ratios 
✔ We partner with professional chargeback management firms for high-volume e-commerce merchants 

For merchants processing significant online volume, we connect you with dedicated dispute specialists who manage disputes at scale. 

Chargebacks are not just disputes. 
They are compliance events.