Glossary
XML (Extensible Markup Language)

XML (Extensible Markup Language)

XML is a structured data format used for transmitting information between systems. In payments, XML is common in settlement files, bank instructions and API integrations.

GLOSSARY
What is a
XML (Extensible Markup Language)

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What is a
Expiry Date (Card Expiry Date)

Expiry Date (Card Expiry Date)

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ZKP (Zero-Knowledge Proof)

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Zero-Rating

Refers to goods or services that are taxed at a 0% VAT rate, affecting invoice and payment calculations.
What is a
Zero-Auth (Zero-Amount Authorisation)

Zero-Auth (Zero-Amount Authorisation)

An authorisation request for a value of £0 used to validate a card before charging it. It confirms card validity without reserving funds.
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