Existing clients of ARC may use this online form to send a message to a specific ARC employee. You may also attach any files that are relevant to your messaget. For groups of files, please zip/compress the files to consolidate the data and to facilitate a faster upload. This web form may be used to submit files up to 100 MB in size. Larger files should be broken up into smaller pieces or sent via secure FTP. Clients logged into the ARC Support site can find more information about available FTP services.