Secure File Upload This area is to be used only by ATR Providers. Your Email* Your Name* ATR Provider Name* Purpose of file upload*Audit materialsConfidentiality PledgeOtherPlease don’t use this form to submit participant referrals to ATR – these must be submitted via the ATR Referral form, located on this website under Our Participants –> Referral Information. Document Upload – May Upload Multiple Files Drop files here or Select files Accepted file types: pdf, xlsx, docx, Max. file size: 500 MB.