Ultimate Settlement
Ultimate settlement is final settlement in the asset at the end of a payment chain, commonly central bank money for interbank obligations.…
Glossary terms starting with U
Numbers and symbols are grouped under #. Letter matching ignores case and uses the first displayed title character.
Unauthorized Transfer Incident
An unauthorized transfer incident is a suspected or confirmed event involving value moved, attempted, or instructed without valid permission from the required…
Uncle Block
An uncle block, more precisely called an ommer in historical Ethereum proof-of-work terminology, is a valid competing block that was not included…
Uncollateralized Stablecoin
An uncollateralized stablecoin is a token that attempts to maintain a target value without reserves or pledged assets sufficient to redeem all…
Unconfirmed Payment
An unconfirmed payment is a payment that has been detected or reported but has not yet met the confirmation rule required for…
Unconfirmed Payment Acceptance
Unconfirmed payment acceptance is a policy under which a merchant treats a broadcast blockchain transaction as sufficient for some business action before…
Unconfirmed Transaction
An unconfirmed transaction is a blockchain transaction that has been submitted or observed but has not yet reached the receiving system’s required…
Undercollateralized Stablecoin
Undercollateralized Stablecoin is a stablecoin whose identifiable collateral value is lower than the outstanding token liabilities or whose design relies materially on…
Underpaid Crypto Payment
An Underpaid Crypto Payment occurs when verified value received for an invoice or order is less than the amount required under the…
Underpayment Coverage
Underpayment coverage is the amount or proportion of an invoice shortfall absorbed, funded, or otherwise resolved by a merchant, platform, payer, credit,…
Underpayment Management
Underpayment management is the process of detecting, classifying, communicating, resolving, and reconciling payments below the required amount. Possible outcomes include requesting the…
Underpayment Policy
An underpayment policy is the documented decision framework a merchant or payment platform uses when confirmed receipts fall below the required invoice…
Underpayment Rate
Underpayment rate is the percentage of eligible payment attempts or invoices that receive less than the required amount during a defined period.…
Underpayment Recovery
Underpayment recovery is the controlled process for resolving a payment that remains below the required amount after validation. Options include requesting a…
Underpayment Tolerance
Underpayment tolerance is the maximum verified shortfall a merchant will automatically accept when a payment is below the required amount. It may…
Unhosted Wallet
An unhosted wallet is a wallet for which the user controls the private keys or equivalent signing authority instead of a custodial…
Unique Payment Address
A unique payment address is a blockchain destination assigned exclusively to one invoice, order, customer, or payment session for a defined use.…
Uniswap (UNI)
UNI is the governance token of the Uniswap protocol and ecosystem of decentralized-exchange, liquidity, routing, and token-launch infrastructure. UNI holders or delegates…
Universal Wallet
A universal wallet is a wallet designed to manage multiple assets, networks, applications, or identity functions through one user experience. For Universal…
Unlimited Token Approval
Unlimited Token Approval is a security mechanism or control discipline that authorizes a spender to transfer up to the maximum representable amount…
Unlocked Token Supply
Unlocked Token Supply is the portion of token supply no longer subject to contractual, smart-contract, vesting, staking, governance, or administrative lockups that…
Unscheduled Credential-on-File Transaction
An unscheduled credential-on-file transaction uses a previously stored payment credential for a charge that occurs without a fixed or regular processing date.…
Unsigned Transaction
An unsigned transaction is a constructed transaction that lacks one or more cryptographic authorizations required for submission or execution. It can be…
Unsolicited Crypto Payment
An unsolicited crypto payment is a transfer received without an active invoice, payment request, expected customer obligation, or prior agreement. It may…