Files downloaded from site – how to address public computers

Our site allows the user to download PDF files (either stored in our CMS system or created as a Stream from the API) that contains personal financial information

We have a client who has asked if we can stop files being downloaded in case the user is on a public computer

Is there a standard approach, either through code or help text, to advise users to be careful on public computers/devices and to ensure confidential personal information is not left on a public device? Does the responsibility lie on the user with as much guidance as possible from the contextual help?