ADM.14:5.1 - Duplicate expense control checks the wrong identity

Policy P requires eligible expenses to be reimbursed once. The qualified case procedure establishes the actual expense and checks its earlier reimbursement effects. A portal has implemented a shortcut that compares only uploaded image hashes.

A claimant uploads a new photograph of an expense whose reimbursement is already confirmed. The image hash differs, so the shortcut does not identify the earlier payment. The controlling claim is “this expense has already been reimbursed”, not “this file has previously been uploaded”.

The service owner recovers P and the adequate existing expense-correspondence procedure. For the actual case, the handler uses the qualified source and effect evidence to establish the earlier reimbursement and applies P’s response. That bounded result can be used immediately; it does not depend on completing a new platform design.

For the reusable repair, the assigned provider implements the supplied correspondence and effect check where the payment decision uses it. The design retains the actual expense identity and evidence needed by the qualified procedure. It does not prescribe an arbitrary universal key or treat equal amounts as one expense.

The exercise includes the same expense with a different photograph, two distinct expenses with equal amounts, and an unavailable prior-payment source. The first must retain the earlier reimbursement result; the second must preserve the distinct expenses; the third must return the missing effect evidence rather than pass the check. These are stated completion conditions for the design and trial, not claims that an implementation has already passed them.