Glossary

Payment Glossary

Definitions for the payment lifecycle, metrics, actors, and failure modes used across this site.

Payment lifecycle

Payment lifecycle: The full sequence of payment activity from obligation and authorization through capture, settlement, downstream losses, and retained revenue.
Payment obligation: The commercial event that creates an amount due, such as an invoice, order, subscription renewal, or other balance that should be collected.
Invoice eligibility: The merchant-side decision about whether an invoice or order should enter the payment flow based on business rules, account state, payment method availability, or other pre-authorization conditions.
Authorization: The request-response process through which a payment is evaluated across the merchant, provider, network, and issuer chain.
Authorization attempt: One technical request made against a payment obligation. A single obligation can produce multiple attempts, especially when retries are used.
Approval: A positive issuer response indicating that the transaction may continue under the conditions evaluated at that moment.
Flow approval: A positive decision by an upstream system, such as a merchant fraud rule, gateway, processor, or network, that allows a request to continue. It is not the same as issuer approval.
Authorization approval: The positive response returned by the issuer after it evaluates an authorization request.
Capture: The instruction to complete an approved transaction. Depending on the integration, capture may happen automatically or through a separate request.
Clearing: The post-authorization process where transaction records are collected and exchanged before settlement.
Settlement: The post-capture stage where funds are finalized or recognized after clearing and related provider or network activity.
Retained revenue: The revenue that remains after downstream losses such as refunds, cancellations, fraud, disputes, and chargebacks.
Payment success funnel: A model that follows value from payment obligation through authorization attempt, approval, capture, settlement, and retained revenue.

Payment metrics

Authorization rate: Industry shorthand for payment authorization performance. The denominator must be made explicit because the phrase can refer to several different measurements.
Authorization attempt rate: The share of payment obligations that enter the authorization flow.
Gross authorization attempt rate: Authorization attempts measured against all payment obligations due, including obligations that never became eligible.
Eligible authorization attempt rate: Authorization attempts measured against the subset of obligations already considered eligible for payment.
Initial approval rate: The share of initial authorization attempts that receive a positive issuer response.
Attempt approval rate: The share of all authorization attempts, including retries, that receive a positive issuer response.
Eventual approval: The outcome for unique payment obligations that eventually receive approval, including those approved after retry activity.
Net payment success rate: The share of payment obligations that ultimately become retained revenue after known downstream losses.

Payment actors

Merchant: The business or platform accepting payment and constructing the payment request.
Gateway: A provider system that accepts, validates, and forwards payment requests between the merchant and downstream payment infrastructure.
Processor: A payment provider that processes and routes transaction messages between merchants, acquirers, networks, and other payment participants.
Acquirer: The acquiring bank or acquiring-side institution that supports the merchant's ability to accept card payments.
Card network: The network that carries card transaction messages between acquiring-side and issuing-side participants.
Issuer: The issuing financial institution that evaluates a transaction and returns an authorization response.
Fraud detection platform: A system that evaluates transaction risk and can allow, block, or influence payment flow before or during authorization.
Orchestrator: A payment routing or coordination layer that can choose providers, paths, credentials, or transaction handling strategies.
Financial institution: A bank or other regulated institution involved in evaluating, issuing, acquiring, funding, or otherwise supporting payment activity.

Failure and optimization

Decline: An unsuccessful authorization or payment-flow outcome. The term should not collapse issuer decisions, merchant rules, provider failures, and technical interruptions into one undifferentiated category.
False decline: A legitimate transaction that is incorrectly rejected or prevented from succeeding.
Payment recovery: Work performed after an unsuccessful payment outcome to recover revenue, often through retries or other follow-up strategies.
Retry recovery: A recovery strategy where additional authorization attempts are submitted after an initial unsuccessful outcome.
Approval optimization: Product, data, routing, trust, or technical work intended to improve legitimate issuer approval outcomes.
Upfront approval optimization: Approval optimization that happens earlier in the payment lifecycle, before recovery is needed.
Payment performance: The combined technical and business performance of the payment flow, from payment entry through retained revenue.
Authorization expiration: A condition where an approval is no longer valid by the time capture is attempted.
Amount mismatch: A mismatch between the amount approved and the amount later submitted or expected during capture or downstream processing.
Provider failure: An outage, rejection, interruption, or other provider-side problem that prevents payment flow from completing as expected.
Refund: A returned payment amount that reduces retained revenue after payment activity has otherwise succeeded.
Cancellation: A downstream customer or merchant outcome that can remove expected retained revenue after payment activity.
Fraud: Illegitimate or risky activity that can affect authorization decisions, downstream losses, and retained revenue.
Dispute: A customer or issuer challenge to a transaction that can reduce retained revenue after settlement.
Chargeback: A payment reversal through the dispute process that can remove revenue after a transaction has otherwise succeeded.