For POLAC (Nigerian Police Academy) portal, the format they accept usually depends on the specific instruction given during the upload stage.
From past applicants’ experience:
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Most portals prefer PDF for documents like JAMB result slip, O’level results, birth certificate, etc., because it keeps everything in one file and is harder to tamper with.
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But for passport photographs, they almost always require JPEG/JPG format.
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Some portals allow either PDF or JPEG for documents, but it’s safest to use PDF unless they clearly specify otherwise.
👉 My advice:
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Prepare all your main documents (JAMB slip, WAEC/NECO, Birth Certificate, State of Origin, etc.) in PDF.
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Keep your passport photo in JPEG