Attach any documentation you have to help substantiate your fraud concern. (Note: You are limited to no more than 5 files, with maximum file size of 5 MB per file. Acceptable file types are limited to .doc, .docx, .pdf, and .jpg formats. Please contact the OSA Fraud Hotline via our phone number or email if you have documentation that exceeds these limitations so we can make alternate arrangements for transmittal.)