I'm trying to incorporate a document that can be updated by another person and uploaded directly onto the website without my involvement

we have a holiday let and it’s to let guests know that the fire alarm etc. have been tested. If the tester can update a document (or tick boxes) without my involvement behind the scenes, so the test results appear on the website that would be ideal. Any suggestions are gratefully received.

You can make a form that goes into a database. Tester submits the form and the site pulls from the database and displays latest test date and other data that’s needed. It can be done.