ILLUSTRATIVE EVENT: sample data only. Replace bracketed fields before sending.

INITIAL REQUEST
Subject: [event] speaker files due [date, time, time zone]
Upload to [file-request URL]. No Dropbox account is required. Your submission ID is [ID]. We need [ID]_slides_v2.pdf and [ID]_portrait_v1.jpg. Please upload both files by [date, time, time zone]. If you revise a file, use the next agreed version and tell [contact] which earlier file it replaces. If upload fails, send the exact visible message and file size to [contact]. Do not send identity documents or payment details.

MISSING AND WRONG VERSION
Subject: S02: updated slides and portrait still needed
We received S02_slides_v1.pdf. We need the agreed v2 slides and have no portrait recorded. Please upload S02_slides_v2.pdf and S02_portrait_v1.jpg at [file-request URL] by [date, time, time zone], or tell [contact] if you need an extension.

WRONG FORMAT
Subject: S03: portrait format
We received S03_portrait_v1.png. Our event intake calls for a JPG portrait. Please export the image as JPG and upload S03_portrait_v1.jpg, or contact [contact] before the deadline if PNG is the only format you have. Renaming the extension does not convert the image.

UNMATCHED SUBMISSION
Subject: Please confirm the submission ID
We cannot match X99_slides_v2.pdf to our expected speaker list. Please confirm the assigned submission ID through [known contact channel]. We have not marked another speaker complete from this file.