An upload and verification system allows a user to upload files which the user would like to attached to the electronic record of a certain event associated with the company, for example, an insurance claim. A quarantine server may receive the uploaded file and scan the file for malicious code. The quarantine server may transmit the file to temporary storage server. The temporary storage server may receive the file, may convert the file to a file format supported by the company system and may compress the file. The temporary storage server may also transmit a preview of the file back to the client device, where the user can verify that the correct document has been uploaded and no mistakes have been made.