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Payment Security Glossary

Plain-English definitions of key terms in payment security, PCI compliance, and secure telephone payments.

Payment Security(34)

Payment Processing(38)

Payment Gateway

Acquiring Bank

Payment Processor

Payment Service Provider (PSP)

Interchange Fees

Merchant Account (MID / Merchant ID / MOTO Account)

Omnichannel Payments

Recurring Billing

Payment Orchestration

Payment Facilitator (PayFac)

Payment Aggregator (PayFac / Payment Facilitator / Master Merchant / PSP)

Batch Processing

Settlement

Clearing

Authorisation (Authorization / Auth / Auth Code / Pre-Auth)

Pre-Authorisation (Pre-Auth / Authorisation Hold / Card Hold)

Void Transaction

Refund (Reimbursement / Money Back / Card Refund / Payment Reversal)

Partial Refund

Capture

Payment Reconciliation

Smart Routing

Dynamic Currency Conversion (DCC / Cardholder Preferred Currency / CPC)

Payment Gateway API (Payments API / Payment Processing API / Card Payment API)

Merchant Discount Rate (MDR)

Chargeback Representment

Payment Automation

Payment Integration

PSTN

NACHA

ABA Routing Number

Card Surcharging

Merchant ID (MID)

Hard Decline (Do Not Honour / DNH / Code 05 / Pickup Card)

MOTO (Mail Order / Telephone Order)

Retry Logic

Soft Decline (Temporary Decline / Recoverable Decline / ISO 8583 51, 59, 91, 96)

Merchant Payment (Merchant Transaction / B2C Payment / Card-Present & Card-Not-Present Payment)

Payment Cards & Networks(14)

BIN (Bank Identification Number)

Visa

Mastercard

American Express

Discover

JCB (Japan Credit Bureau / JCB Card / JCB International)

Debit Card (Bank Card / Check Card / Visa Debit / Mastercard Debit)

Card Issuer

Card Scheme

EMV Chip

Magnetic Stripe

HSA/FSA Card Payments

Card Network

Card-Present Transaction

Fraud & Risk(13)

Chargeback

Data Breach

Fraud Prevention

Card Testing Fraud (Carding / Card Checking / BIN Attacks)

Account Takeover

Identity Theft

Address Verification Service (AVS)

Velocity Checks

Risk Scoring

Machine Learning Fraud Detection

Device Fingerprinting

Compelling Evidence (CE 3.0)

Representment

Regulation & Standards(17)

GDPR

PSD2

FCA Consumer Duty

Payment Services Directive

Anti-Money Laundering (AML)

Know Your Customer (KYC / CDD / KYB / CIP)

Sanctions Screening

Dispute Resolution

TCPA

HIPAA Payment Compliance

Business Associate Agreement (BAA / HIPAA Business Associate Contract)

CCPA

CPRA

Regulation E

FTC Safeguards Rule

DORA (Digital Operational Resilience Act)

SOC 2

Digital & Emerging(14)

API Integration

Webhook

Payment SDK

Headless Commerce

Embedded Payments

Invisible Payments

Conversational Commerce

Voice Commerce

AI Payments

Open Banking API

Digital Payment Platforms

Payment Experience

Click to Pay (C2P / EMVCo SRC / Secure Remote Commerce)

Secure Remote Commerce (SRC)

Business Operations(11)

Payment Reference

Merchant Reference Number

Call Reference Number

Merchant Category Code (MCC)

Invoice Factoring

Dunning

Payment Reminder

Subscription Management

Revenue Recovery

Failed Payment Recovery

CRN

All Terms A-Z

3D Secure / SCA 3D Secure 2 (3DS2)ABA Routing Number Access Control Server (ACS)Access Control Service (ACS / 3DS ACS)Account Takeover Acquiring Bank Address Verification Service (AVS)Advanced Intrusion Detection Environment (AIDE)Agent-Assisted Payments AI Payments American Express Anti-Money Laundering (AML)API Integration Apple Pay (Apple Wallet / Apple Digital Wallet / iPhone Mobile Wallet)Approved Scanning Vendor (ASV)Attestation of Compliance Authorisation (Authorization / Auth / Auth Code / Pre-Auth)Automatic Call Distributor (ACD)Average Handling Time (AHT)Bank Identification Number (BIN / IIN)Batch Processing BIN (Bank Identification Number)Biometric Authentication Business Associate Agreement (BAA / HIPAA Business Associate Contract)Call Recording Call Reference Number Capture Card Issuer Card Network Card Not Present (CNP)Card on File (CoF / Stored Credentials / COF Payments)Card Scheme Card Security Code Card Surcharging Card Testing Fraud (Carding / Card Checking / BIN Attacks)Card-Present Transaction Cardholder Data (CHD)Cardholder Data Environment (CDE)CCaaS CCPA Channel Separation Chargeback Chargeback Fraud Chargeback Representment Clearing Click to Pay (C2P / EMVCo SRC / Secure Remote Commerce)Cloud Contact Centre Common Services Layer (CSL)Compelling Evidence (CE 3.0)Compensating Controls Computer Telephony Integration (CTI)Contact Centre Payments Contactless Payments Conversational Commerce CPRA Credit Card Number CRN Customer Satisfaction Score (CSAT)CVV / CVC / CV2 Data Breach Debit Card (Bank Card / Check Card / Visa Debit / Mastercard Debit)Descoping PCI DSS Detokenization (Token to PAN Exchange)Device Fingerprinting Digital Payment Platforms Direct Debit Discover Dispute Resolution DORA (Digital Operational Resilience Act)DTMF Masking Dunning Dynamic Currency Conversion (DCC / Cardholder Preferred Currency / CPC)Embedded Payments EMV Chip Encryption End-to-End Encryption (E2EE)Face-to-Face (F2F) Payments Failed Payment Recovery Faster Payments Service FCA Consumer Duty FedNow Firewall First Call Resolution (FCR)Fraud Prevention Friendly Fraud FTC Safeguards Rule GDPR Google Pay (Google Wallet / Android Pay / GPay)Hard Decline (Do Not Honour / DNH / Code 05 / Pickup Card)Hashing Headless Commerce HIPAA Payment Compliance Hosted Payment Page HSA/FSA Card Payments Identity Theft Instant Bank Transfer Integrated Services Digital Network (ISDN / ISDN30 / ISDN2 / PRI / BRI)Interchange Fees Internal Security Assessor (ISA)Intrusion Detection System (IDS / IPS / NIDS / HIDS / IDPS)Invisible Payments Invoice Factoring IPsec (Internet Protocol Security / IPsec VPN / IKEv2)IVR Payment (Interactive Voice Response / Automated Phone Payment / Pay by Phone)JCB (Japan Credit Bureau / JCB Card / JCB International)Key Management Know Your Customer (KYC / CDD / KYB / CIP)Luhn Algorithm Machine Learning Fraud Detection Magnetic Stripe Mail Order Telephone Order (MOTO)Mastercard Merchant Account (MID / Merchant ID / MOTO Account)Merchant Category Code (MCC)Merchant Discount Rate (MDR)Merchant ID (MID)Merchant Payment (Merchant Transaction / B2C Payment / Card-Present & Card-Not-Present Payment)Merchant Reference Number Mobile NFC Payments (Apple Pay / Google Pay / Samsung Pay / Tap to Pay)MOTO (Mail Order / Telephone Order)Multi-Factor Authentication (MFA)NACHA Net Promoter Score (NPS)Network Segmentation Network Token Omnichannel Payments Open Banking Open Banking API Open Banking Payments PAN (Primary Account Number)Partial Refund Pause and Resume Pause and Resume in Contact Centres (Pause Resume PCI)Payment Aggregator (PayFac / Payment Facilitator / Master Merchant / PSP)Payment Automation Payment Card Industry (PCI)Payment Compliance Payment Experience Payment Facilitator (PayFac)Payment Gateway Payment Gateway API (Payments API / Payment Processing API / Card Payment API)Payment Integration Payment Link Payment Orchestration Payment Processor Payment Reconciliation Payment Reference Payment Reminder Payment SDK Payment Security Standards Payment Service Provider (PSP)Payment Services Directive Payment Tokenisation Service PCI DSS PCI DSS Compliance PCI DSS Levels (PCI Merchant Levels / PCI Compliance Levels / PCI Tiers)PCI DSS Non-Compliance PCI DSS Scope PCI DSS v4.0 PCI DSS v4.0.1 PCI Level 1 Service Provider PCI SSC Peer-to-Peer Payments (P2P / Person-to-Person / P2P Transfer)Penetration Testing Point-to-Point Encryption (P2PE)Pre-Authorisation (Pre-Auth / Authorisation Hold / Card Hold)PSD2 PSTN Pull Payment QR Code Payments Qualified Security Assessor (QSA)Quality Monitoring Recurring Billing Refund (Reimbursement / Money Back / Card Refund / Payment Reversal)Regulation E Report on Compliance (ROC)Representment Retry Logic Revenue Recovery Risk Scoring RTP Samsung Pay / Samsung Wallet (NFC, MST, Device Account Number)Sanctions Screening SAQ (Self-Assessment Questionnaire)Secure Remote Commerce (SRC)Secure Telephone Payments Self-Assessment Questionnaire (SAQ)Sensitive Authentication Data (SAD)Sentiment Analysis Session Border Controller (SBC)Session Initiation Protocol (SIP)Settlement SIP Trunking Smart Routing SOC 2 Soft Decline (Temporary Decline / Recoverable Decline / ISO 8583 51, 59, 91, 96)Speech Analytics Standing Order STIR/SHAKEN Strong Customer Authentication (SCA)Subscription Management TCPA Telephone Payment Solutions Tokenization UCaaS Variable Recurring Payment (VRP)Velocity Checks Verified by Visa (VbV / Visa Secure / Visa 3D Secure)Visa Visa Global Registry of Service Providers (Visa Service Provider Registry)Voice Commerce Void Transaction VoIP Vulnerability Scanning Webhook WebRTC Workforce Management

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