Payment release authorization
Business email compromise and deepfake impersonation both end at the same place: somebody releases a payment. These essays examine the release step itself — what an approval record actually proves, where callbacks fail, and what binding an approval to the payload changes.
All 12 essays
The deepfake wire trap: why out-of-band callbacks fail UCC Article 4A
Treasury policy mandates a phone callback before releasing a large wire. Voice and video cloning defeat that control at commodity cost.
The callback warranty trap: why funds transfer fraud claims get denied
Crime and cyber policies condition funds transfer fraud coverage on verification procedures the insured warrants it will follow.
The four-eyes illusion: why ERP dual authorization does not stop push payment fraud
Maker-checker in an ERP records approvals as database rows. A stolen session or a post-approval field edit produces a payment that looks clean.
Nacha fraud monitoring: what 'authorized under false pretenses' asks of originators
Nacha extended fraud monitoring obligations to originators and third-party senders, with credit entries induced by false pretenses in scope.
Instant rails, instant irreversibility: what RTP and FedNow remove
Traditional wires left a window in which a fraud desk could attempt recall. Instant credit transfers settle irrevocably in seconds.
Gating payment orders at the API boundary: an API key is not an intent
Programmatic treasury platforms treat possession of an API key as proof of intent. A scheduled batch and an attacker look identical.
The vendor invoice scam: deconstructing account details substitution
Attackers compromise a vendor's email, send updated bank details on genuine letterhead, and slip the change past AP approvers.
What external auditors actually require for electronic payment approvals
Companies submit chat screenshots to evidence payment approval controls. AS 2201 asks for operating effectiveness, which a screenshot is not.
Payroll diversion: when the session is stolen, the HR portal cannot tell
Infostealers harvest SSO sessions and change direct deposit details. Detection sees a legitimate session from a plausible location.
A security engineer's teardown of payment release in AP and spend platforms
Spend platforms compete on zero-click automation. Every second removed from the release path is a second removed from the confirmation gate.
Homoglyphs and Unicode confusables in payee names: the cheapest attack on approvals
Attackers register payee names using lookalike characters. The database stores distinct strings; the approval screen renders them identically.
Why account masking in AP systems directly enables wire fraud
Truncating account numbers on approval screens conceals precisely the digits an attacker substitutes in a beneficiary detail change.