Release 4.5.0

• Channel: stable
• Deployment target: production
• Published: 2026-06-25T16:39:35Z
• Release tag: v4.5.0

Admin Panel

• Introduced a maintenance action detector and dashboard display for tax records, allowing administrators to monitor and resolve data discrepancies.
• Updated UK VAT territory terminology and jurisdiction logic to include the Isle of Man.
• Enhanced financial reporting to include chargeback tax adjustments and preserve One-Stop Shop (OSS) transaction links.
• Improved the visibility of chargeback-related maintenance actions on the dashboard.

APIs And Integrations

• Added support for checkout provider overrides, allowing for more granular control over transaction routing.
• Decoupled Instant Payment Notification (IPN) dispatch from tax finalization, ensuring payment notifications are delivered even if tax processing experiences delays.

Checkout And Customer Portal

• Improved checkout reliability by implementing handling and retries for stalled session loads.
• Resolved an issue where payment URLs did not consistently use the configured provider domains.

Deployment And Operations

• Optimized system performance by implementing bulk processing for tax maintenance scans and limiting detector frequency.
• Enhanced version transparency by exposing build metadata in internal health check endpoints.

Fixes

• Fixed a bug where One-Stop Shop (OSS) chargeback transaction links were lost during record updates.
• Resolved an issue where the Admin Panel would ignore or hide maintenance actions due to stale API responses.

Security Artifacts

Release security evidence is linked from the Release Security Transparency guide.

• Artifact index: https://docs.payment-gateway.app/release-security/v4.5.0/artifact-index.json
• Scan manifest: https://docs.payment-gateway.app/release-security/v4.5.0/reports/scan-manifest.json
• Vulnerability policy result: https://docs.payment-gateway.app/release-security/v4.5.0/reports/policy-result.json
• Vulnerability summary: https://docs.payment-gateway.app/release-security/v4.5.0/reports/summary.md
• Component image provenance: https://docs.payment-gateway.app/release-security/v4.5.0/reports/component-image-provenance.json
• Release provenance statement: https://docs.payment-gateway.app/release-security/v4.5.0/provenance.intoto.jsonl
• Checksum manifest: https://docs.payment-gateway.app/release-security/v4.5.0/SHA256SUMS
• Checksum signature bundle: https://docs.payment-gateway.app/release-security/v4.5.0/SHA256SUMS.sigstore.json