What file naming rules should I follow when submitting files?

Simple, clean file names upload most reliably. Rename the file before submitting and remove anything beyond standard characters.

• Strip out special characters such as # % & / \ * ? and accent marks.
• Use only letters, numbers, hyphens, and underscores.
• Avoid spaces where possible. A hyphen or underscore reads more cleanly.

A name like business-card-front.pdf uploads and processes without the errors that odd characters can cause.

Keep the name short and descriptive. If a file still will not upload after renaming, check its size and format.