Cancel an in-progress attachment without a stale success

What to change

Ask the supplier to keep the visible attachment list aligned with the visitor's latest remove or cancel action.

A worked example

Illustrative example

A visitor removes an accidentally chosen leaflet while it uploads, then selects the intended document. Only the replacement remains attached after both operations settle.

How to check the result

Accept when cancellation remains effective and later transfer events cannot reverse the visitor's current selection.

A mistake to avoid

Hiding the file row immediately is a visual change, not proof that the unfinished operation can no longer affect the submitted attachment set.

Your action checklist

Use these checks to prepare a discussion with your team or supplier. Tick a check when you have recorded the decision or evidence, rather than when a feature has simply been promised.

Decisions to recordStart uploading a harmless large file on a slow test connection and remove it before completion. Wait for the original transfer response to arrive.Check that the removed file does not reappear or become included in the final test submission. Ask the supplier to demonstrate the cancellation outcome explicitly.Choose a replacement file immediately after removal. Confirm late events from the first file cannot overwrite the replacement's name, progress or state.

Evidence, open questions and decisionsNext action and responsible role

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