have on file
have (something) on file
To have something available for reference through storage in a physical or digital file system. You must keep all bank records on file for a minimum of five years. Yes, I have your number on file in case we need to get in touch with you again.
have something on file
to have a written record of something in storage. I'm sure I have your letter on file. I'll checkagain. We have your application on file somewhere.