TroubleshootFind the likely cause when a receipt challenge behaves differently from plan.Copy MarkdownOpenStart here when submissions are being refused unexpectedly, OCR quality is poor, or the same participant behavior keeps looking suspicious. Common acceptance failuresMap the most common refusal patterns back to the acceptance policy.OCR issuesImprove receipt image quality and understand what OCR can realistically extract.Fraud patternsWatch for repeat submission behavior, duplicate receipts, and over-aggressive rule settings.Was this helpful?Optional comments help us improve this page for future authors and readers.HelpfulNot helpfulCommentSubmit feedback