The Underground Guide to POS Entry Mode Codes: Hacking the Transaction Layer

Introduction (POS Entry Mode Codes)

Every time a payment card is used at a terminal, a small but critical piece of data travels with the transaction. It tells the bank exactly how the card was read. Was it dipped into the chip reader? Swiped through the magnetic stripe? Tapped against the NFC reader? Or was the card number typed in manually by a cashier?

That piece of data is the POS entry mode code. And it matters far more than most people realize.

For payment processors, developers, security researchers, and merchants alike, understanding these codes is like knowing the secret handshake of the payment ecosystem. These codes determine whether a transaction is approved, what fees are applied, who bears liability for fraud, and even whether the transaction is allowed to go through at all.

This guide will take you deep into the world of POS entry mode codes. You will learn what each code means, how they interact with the broader payment system, and how to use this knowledge to optimize transaction approval rates while staying within the rules of the network.

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What Are POS Entry Mode Codes? (The Real Deal)

A POS entry mode code is a two-digit numeric value embedded in the transaction data sent from a payment terminal to the processing network. It describes the method used to capture the cardholder’s account information at the point of sale.

Think of it as a label that tells the bank: “This is exactly how the card data entered the system.”

The code is part of the authorization request message that travels through the payment chain. It goes from the terminal to the acquirer (the merchant’s bank), then to the card network (Visa, Mastercard, etc.), and finally to the issuer (the cardholder’s bank). Every link in that chain uses the entry mode code to make decisions.

Why does this matter? Because the entry mode code directly affects:

• Fraud liability: Card present transactions (where the physical card was used) shift liability away from the merchant in many cases. Card not present transactions place more risk on the merchant.
• Approval rates: Issuers are more likely to approve transactions where the card was physically present and verified through chip or contactless methods.
• Interchange fees: Different entry modes trigger different fee structures. Chip transactions typically have lower interchange rates than key entered transactions.
• Security scoring: Fraud detection systems weigh entry mode heavily when calculating risk scores.

The entry mode code is not the same as the terminal capability or the cardholder verification method, though these fields work together. The entry mode specifically describes how the data was captured, not how the cardholder was verified or what the terminal is capable of.

The POS Entry Mode Codes List That Matters (POS Entry Mode Codes)

There are many entry mode codes defined by the payment networks, but only a handful appear in the vast majority of transactions. Here is the essential list.

Code	Description
00	Unknown or unspecified
01	Manual key entry
02	Magnetic stripe read
03	Barcode scan
04	Optical character recognition
05	Integrated circuit card (EMV chip) using terminal reader
06	Contactless EMV chip
07	Contactless magnetic stripe (stored as contactless MSD)
08	Magnetic stripe read followed by ICC fallback
09	Contactless magnetic stripe followed by ICC fallback
10	Credential on file
79	Contactless EMV chip with mobile phone
80	Magnetic stripe read with CVV
81	Contactless magnetic stripe with CVV
90	Chip card with PIN
91	Contactless chip with PIN
95	Chip card with signature

Each code tells a different story about how the transaction happened. Code 01 (manual key entry) suggests the card was not present or the terminal could not read it. Code 05 (EMV chip) indicates a secure, card present transaction. Code 06 or 07 (contactless) shows the card was tapped.

The distinction between code 05 and code 06 is important. Code 05 means the chip was read by physically inserting the card into the terminal. Code 06 means the chip was read via NFC without physical contact.

Visa POS Entry Mode Codes Explained

Visa uses a specific set of entry mode codes that align with the global standard but include some proprietary values.

The most common Visa entry mode codes include:

• 00: Unknown. Rarely used in modern systems.
• 01: Manual key entry. High risk. High interchange fees. Often triggers additional verification.
• 02: Magnetic stripe read. Becoming less common as EMV adoption increases. Still used in regions without chip infrastructure.
• 05: EMV chip read. The gold standard for card present transactions.
• 06: Contactless EMV. Growing rapidly with the adoption of tap to pay.
• 07: Contactless magnetic stripe. Used by older contactless cards that do not have a chip.
• 10: Credential on file. Used for recurring payments where the cardholder authorized storage of their details.
• 79: Contactless EMV using a mobile device like Apple Pay or Google Pay.
• 80: Magnetic stripe with CVV2. The CVV2 provides an extra layer of verification.
• 90: EMV chip with online PIN. The PIN was verified by the issuer.
• 91: Contactless chip with online PIN.

Visa treats entry mode 05 and 06 as the most secure. Transactions using these codes are eligible for the lowest interchange rates and receive the highest level of fraud protection for merchants.

Visa also uses the entry mode code in combination with the cardholder verification method (CVM) to determine liability shifts. A chip transaction with an online PIN (code 90) provides the strongest liability protection for the merchant.

Mastercard POS Entry Mode Codes Explained (POS Entry Mode Codes)

Mastercard defines its entry mode codes similarly to Visa but with some differences in the code values and their interpretations.

Key Mastercard entry mode codes:

• 00: Unknown.
• 01: Manual key entry.
• 02: Magnetic stripe.
• 03: Barcode.
• 04: OCR.
• 05: EMV chip.
• 06: Contactless EMV.
• 07: Contactless magnetic stripe.
• 08: Magnetic stripe followed by chip fallback.
• 09: Contactless magnetic stripe followed by chip fallback.
• 10: Credential on file.
• 79: Mobile contactless.
• 80: Magnetic stripe with CVV.
• 81: Contactless magnetic stripe with CVV.
• 90: Chip with PIN.
• 91: Contactless chip with PIN.

Mastercard places special emphasis on fallback codes (08 and 09). A fallback occurs when the chip is read but fails, and the terminal falls back to reading the magnetic stripe. This is a red flag for fraud detection systems because it can indicate a cloned card where the chip cannot be duplicated.

Mastercard also uses the entry mode code to determine whether chargeback rights apply. For a merchant to receive chargeback protection, the transaction must use an approved entry mode with a verified CVM.

Step-by-Step: How to Leverage Entry Codes for Maximum Approval (POS Entry Mode Codes)

Understanding entry mode codes is useful. Knowing how to use them is where the real value lives.

Step 1: Audit your current transaction data.

Pull a report from your payment processor showing the entry mode codes for your last 1,000 transactions. Identify which codes appear most frequently. If you see a high percentage of code 01 (manual entry) or code 02 (magnetic stripe), you have room for improvement.

Step 2: Upgrade your terminal hardware.

Older terminals may not support contactless EMV or may default to magnetic stripe reading. Replace them with modern terminals that prioritize chip reading and NFC. This alone can shift your entry mode profile toward codes 05 and 06.

Step 3: Configure your terminal software correctly.

Many terminals can be configured to require chip reading when available. If the terminal allows fallback to magnetic stripe without attempting the chip first, you are losing security and paying higher fees. Set the terminal to force chip reading.

Step 4: Train your staff.

Cashiers should know to insert the card for chip reading, not swipe it. They should also know to tap for contactless when the customer presents a card or mobile device. Proper staff training reduces the number of manual entry and swipe transactions.

Step 5: Enable contactless for all capable terminals.

Contactless transactions (code 06, 07, 79) have higher approval rates than inserted chip transactions for small amounts. Many issuers approve contactless transactions up to a certain limit without requiring a PIN or signature.

Step 6: Monitor fallback rates.

If your fallback rate (codes 08 and 09) exceeds 5 percent, investigate. High fallback rates can indicate faulty terminals, untrained staff, or fraud activity. Reduce fallback to improve approval rates and lower fees.

Step 7: Use credential on file correctly.

For recurring billing, use entry mode code 10. This signals to the issuer that the transaction is a legitimate recurring payment, not a new card not present transaction. This can improve approval rates for subscription businesses.

Advanced Tactics: Thinking in Systems (POS Entry Mode Codes)

Entry mode codes do not exist in isolation. They interact with other transaction fields to create a complete picture for fraud scoring systems.

Terminal capability versus entry mode.

The terminal capability field tells the network what the terminal is capable of reading. The entry mode tells the network what was actually used. These fields should be consistent. If the terminal reports it can read chips (capability 2) but the entry mode says magnetic stripe (code 02), the system may flag the transaction as suspicious.

Cardholder verification method (CVM) (POS Entry Mode Codes)

The CVM describes how the cardholder was verified. Was it a PIN? A signature? No verification? The combination of entry mode and CVM tells the full story. Code 05 (chip) with CVM 01 (online PIN) is the strongest combination. Code 01 (manual entry) with CVM 00 (no verification) is the weakest.

Authorization request cryptogram (ARQC). 

For EMV transactions, the chip generates a cryptogram that proves the card was genuine. The entry mode code tells the system whether a cryptogram should be present. If the entry mode indicates chip reading but no cryptogram is present, the transaction will likely be declined.

Network tokenization (POS Entry Mode Codes)

When a card is tokenized (for example, in a mobile wallet), the entry mode code may change. A tokenized contactless transaction using a mobile device typically uses code 79. This tells the issuer that the transaction was processed using a device level token, which has different liability rules than a regular contactless transaction.

Geolocation and timing.

Advanced fraud systems combine entry mode with geolocation and timing data. A chip transaction (code 05) that originates from a location far from the cardholder’s home address within minutes of a previous transaction may still be flagged, even though the entry mode is secure.

Common Mistakes with POS Entry Mode Codes (POS Entry Mode Codes)

Even experienced payment professionals make errors when working with entry mode codes.

Mistake 1: Using manual entry when the card is present.

Some merchants key enter the card number instead of using the terminal reader. This is often done for speed but it triggers higher fees and weaker fraud protection. Always use the terminal reader when the card is present.

Mistake 2: Ignoring fallback rates (POS Entry Mode Codes)

A small number of fallback transactions is normal. A high number indicates a problem. Many merchants do not monitor fallback rates and lose money through higher chargebacks and fees.

Mistake 3: Misconfiguring terminal settings.

Terminals that are not configured to prioritize chip reading will default to magnetic stripe. This costs merchants money and increases fraud risk.

Mistake 4: Confusing entry mode with transaction type (POS Entry Mode Codes)

Entry mode describes how the data was captured. Transaction type describes the nature of the transaction (purchase, refund, pre authorization). These are different fields and serve different purposes.

Mistake 5: Not updating terminal firmware.

Payment networks update their rules and codes periodically. Terminals running outdated firmware may send incorrect or deprecated entry mode codes, leading to declines.

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Pro Tips from Payment Industry Insiders

These tips come from years of working with payment terminals, processors, and networks.

Tip 1: Know your interchange rates.

Each entry mode code maps to a specific interchange rate. Review your interchange statements and identify which codes are costing you the most. Then adjust your terminal configuration and staff training accordingly.

Tip 2: Test your terminal configuration.

Before deploying new terminals, run test transactions with different card types and entry methods. Verify that the correct entry mode codes are being sent. Use a test card that supports chip, contactless, and magnetic stripe.

Tip 3: Monitor approval rates by entry mode (POS Entry Mode Codes)

Track approval rates separately for each entry mode code. If code 02 (magnetic stripe) has a lower approval rate than code 05 (chip), that is expected. But if code 05 suddenly drops, investigate.

Tip 4: Use entry mode data for chargeback representment.

When fighting a chargeback, the entry mode code is evidence. A chip transaction with online PIN is nearly impossible to reverse if the card was present and the PIN was verified.

Tip 5: Understand regional differences.

In the United States, magnetic stripe transactions are still common. In Europe, chip and contactless dominate. If you operate internationally, your entry mode strategy must account for regional card usage patterns.

Expert Insights on Transaction Routing (POS Entry Mode Codes)

Transaction routing decisions are influenced heavily by entry mode codes. Payment gateways and processors use entry mode to determine which acquiring bank or processing path to use.

Some processors route chip transactions (code 05) through a different authorization system than magnetic stripe transactions (code 02). This is because chip transactions have different data requirements, including the cryptogram and application transaction counter (ATC).

Contactless transactions (code 06, 07, 79) may be routed through a faster authorization path for small amounts. Many issuers allow contactless transactions under a certain threshold to be authorized offline, meaning the terminal approves the transaction without contacting the issuer.

Credential on file transactions (code 10) are often routed through recurring billing systems that have different rules than one time transactions. These systems expect consistent transaction amounts and intervals.

Understanding how your processor routes transactions based on entry mode can help you optimize for speed, cost, and approval rates.

Real-World Applications of Entry Mode Knowledge (POS Entry Mode Codes)

Ecommerce merchants.

For online stores, entry mode code 01 (manual entry) or 10 (credential on file) is used. Understanding how these codes affect interchange fees and fraud scoring can help you choose the right payment gateway and configure your checkout flow.

Brick and mortar retailers.

Physical stores should aim for code 05 (chip) and code 06 (contactless) as the primary entry modes. This minimizes fees and maximizes fraud protection.

Restaurants and hospitality (POS Entry Mode Codes)

These businesses often use mobile terminals where the card is brought to the table. Ensuring the terminal reads the chip or uses contactless rather than manual entry is critical for security.

Subscription businesses.

Using entry mode code 10 correctly can improve approval rates for recurring billing. Many subscription businesses see higher decline rates because they use the wrong entry mode code.

High risk merchants (POS Entry Mode Codes)

Merchants in high risk industries face higher scrutiny from issuers. Using secure entry modes (chip, contactless, PIN) can help offset the risk profile and improve approval rates.

Actionable Takeaways on POS Entry Mode Codes

1. Learn the entry mode codes for your payment processor and terminal.
2. Audit your current transaction data to see which codes you are sending.
3. Configure your terminals to prioritize chip reading over magnetic stripe.
4. Train staff to use the terminal correctly for every transaction.
5. Monitor fallback rates and investigate if they exceed 5 percent.
6. Use credential on file codes for recurring transactions.
7. Review interchange statements to see how entry modes affect your fees.
8. Test terminal configurations before deploying new hardware.
9. Track approval rates by entry mode and investigate anomalies.
10. Use entry mode data in chargeback disputes.

Frequently Asked Questions on POS Entry Mode Codes

What is a POS entry mode code?

A POS entry mode code is a two digit value that tells the payment network how the card data was captured at the terminal. It indicates whether the card was swiped, dipped, tapped, or key entered.

Why do POS entry mode codes matter?

They affect fraud liability, interchange fees, approval rates, and chargeback protection. Using the correct entry mode can save merchants money and reduce fraud risk.

What is the difference between entry mode 05 and 06?

Entry mode 05 means the EMV chip was read by inserting the card into the terminal. Entry mode 06 means the chip was read via contactless NFC without physical insertion.

What is a fallback transaction?

A fallback occurs when the chip cannot be read and the terminal falls back to reading the magnetic stripe. This is indicated by entry mode codes 08 and 09.

Can entry mode codes be manipulated?

The entry mode code is set by the terminal based on how the card was read. Manipulating the code to misrepresent the transaction method is against network rules and can result in fines or termination.

How do entry mode codes affect chargebacks?

Card present transactions with chip reading (code 05) provide strong chargeback protection for merchants. Card not present transactions (code 01) offer less protection.

What entry mode code should I use for recurring payments?

Use entry mode code 10 (credential on file) for recurring payments where the cardholder has authorized storage of their payment details.

Do mobile wallets change the entry mode code?

Yes. Mobile wallet transactions typically use entry mode code 79, which indicates a contactless EMV transaction using a mobile device.

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Summary and Conclusion of POS Entry Mode Codes

POS entry mode codes are a hidden layer of the payment ecosystem that most people never think about. But for those who understand them, they offer a way to optimize transaction approval rates, reduce fees, and strengthen fraud protection.

The key codes to know are 01 (manual entry), 02 (magnetic stripe), 05 (EMV chip), 06 (contactless EMV), 07 (contactless magnetic stripe), 10 (credential on file), and 79 (mobile contactless). Each code carries different implications for liability, cost, and security.

By auditing your current transaction data, configuring your terminals correctly, training your staff, and monitoring your fallback rates, you can shift your entry mode profile toward the most favorable codes. This translates directly into better approval rates and lower costs.

The payment networks continue to evolve their rules and codes. Staying informed about changes to entry mode definitions and their implications is essential for anyone serious about payment optimization.

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