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Payment terms,
in plain language.

A useful reference for the words you see along the way. A term appearing here does not mean the related option is enabled for your account.

Payment glossary

Payment glossary

Definitions of payment rails, bank references, verification and digital-asset terms.

A terms

ACH

A U.S. electronic bank-transfer system. ACH payments use banking-day schedules; a submission confirmation is not necessarily final availability.

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Authenticator

An app that generates short-lived security codes for sign-in or other protected actions. Its setup secret and QR code must be kept private.

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Available balance

The amount currently shown as available for an allowed action. Incoming, pending or reviewed payments may not yet be included; follow the status in your workspace.

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B terms

BACS

A UK bank-payment system with business-day processing. Some larger GBP routes may use BACS instead of Faster Payments.

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Beneficiary

The person or business named as the recipient of a payment. Use the exact beneficiary specified by the active instructions.

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Blockchain network

The blockchain used for a digital-asset transfer. Support must match the exact asset-network pair; a similar wallet address does not make two networks interchangeable.

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Bre-B

A Colombian domestic payment rail. Availability, destination requirements and limits depend on the enabled route.

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Business day

A day when the institutions relevant to a payment are processing the applicable banking activity. Weekends, local holidays and timezones can affect it.

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C terms

CLABE

The standardized account identifier used for Mexican bank transfers. Use the complete CLABE provided in the approved instructions.

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Compliance review

Checks on a customer or payment to assess eligibility and applicable requirements. A review can require more information even after initial account approval.

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Currency conversion

Changing one currency or asset into another through an available route. The actual quote and charges determine the result; support and timing are not universal.

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Custody

Holding or controlling assets on behalf of another person. Where applicable to an Ostro flow, custody is provided by licensed financial partners. A route listing does not establish custody eligibility.

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Cutoff time

The latest applicable submission time for a processing window. Missing a cutoff may move processing to a later window or business day.

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D terms

Domestic wire

A U.S. domestic bank-transfer method for eligible USD payments. Follow the wire-specific instructions and applicable banking-day cutoff.

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E terms

End-to-end reference

An identifier associated with a transfer that can help institutions match or investigate it. Its format and availability depend on the rail and bank.

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ET / Eastern Time

U.S. Eastern Time. EST and EDT are its standard-time and daylight-saving forms. A cutoff expressed in ET may correspond to a different local time during the year.

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F terms

Faster Payments

A UK domestic payment rail for eligible GBP transfers. Around-the-clock rail operation does not bypass checks or establish access for every sender.

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FedNow

A U.S. real-time payment rail available through participating institutions. An Ostro route must be enabled and the destination institution must support it.

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Fiat currency

A currency issued by a monetary authority, such as USD, EUR or BRL. Receiving and payout availability must be checked separately for each currency.

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First-party payment

A payment you send from your own eligible account. A client or employer sending money is a different payer relationship.

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I terms

IBAN

A standardized international bank-account identifier used in supported payment systems. An IBAN alone does not establish support for every currency or for SWIFT.

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IMAD

A reference used to identify a U.S. wire payment. Ask the sending bank for the IMAD or other wire-tracking reference when investigating a missing wire.

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K terms

KYB

Know Your Business: checks concerning a legal entity and, where required, its ownership, controllers and activities. Requirements vary with the entity and jurisdiction.

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KYC

Know Your Customer: checks to establish identity and assess the relationship. Completing a submission is different from receiving approval and payment activation.

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M terms

Memo or payment reference

Information the payer must include when instructed, often to identify the payment. It is separate from the beneficiary account number and must match the receiving instructions.

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O terms

Offramp

A supported flow converting digital assets into fiat for settlement. Availability depends on the approved asset, destination, jurisdiction and financial-partner route.

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Onramp

A supported flow moving fiat into a digital-asset payment process. The term does not imply that every receiving payment converts automatically or that any payer is allowed.

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P terms

Payment rail

The system used to move a payment, such as ACH, SEPA or Pix. Several rails can use one currency with different instructions, limits and timing.

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Payout

An available payment to a verified bank destination or supported wallet. The destination, method and any conversion must be eligible for the account.

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Pix

A Brazilian domestic payment system. Use the issued Pix instructions and confirm the payer flow is supported before arranging a payment.

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R terms

Receiving details

The available instructions used to receive an eligible payment. They are specific to a route and are not a claim that Ostro provides a traditional bank account.

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Return

A payment sent back through the applicable process. A requested return is not confirmation that funds have arrived back, and not every transfer can be returned.

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Routing number

An identifier used for U.S. bank-transfer routing. Use the number specified for the actual payment method; ACH and wire instructions may differ.

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S terms

SEPA

A framework for eligible euro payments. SEPA Credit Transfer and SEPA Instant have different processing characteristics and bank-support requirements.

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Settlement

The completion of the applicable movement of value through a payment system. Partner processing, settlement and final visibility at the destination can be separate stages.

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Source of funds

Information explaining where payment funds originated. Evidence may be requested as part of onboarding or a transaction review.

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SPEI

A Mexican domestic electronic payment system. Use the issued CLABE and reference for the supported MXN route.

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Stablecoin

A digital asset designed to track a reference value, often a fiat currency. The name or target peg is not a guarantee of a conversion rate, availability or support on every network.

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SWIFT

An international financial messaging network. Domestic receiving instructions do not become SWIFT-compatible simply because an overseas payer is sending money.

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T terms

Third-party payment

A payment from another person or business rather than your own account. Payer type and jurisdiction can affect whether it is permitted on a route.

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Trace number

A bank-provided identifier that helps investigate an ACH payment. It is different from a support-ticket number or an invoice number.

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Transaction hash

The identifier for a transaction submitted to a blockchain. A sending platform may have its own withdrawal reference before any blockchain hash exists.

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V terms

Verified destination

A bank account or wallet that has passed the applicable destination checks. Verification does not guarantee every currency, asset or network is enabled.

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