Hacking / Damage to computer,computer system etc.
Tampering with computer source documents
Records on a computer are changed or deleted by someone who was not allowed to do that.
Warning signs
A bill, marksheet, or record looks different from the copy you saved.
Someone asks you to install a remote app so they can “correct” an official file.
You cannot explain who edited the file, or the edit happened at night when nobody was working.
A link in a mail says you must upload the original document to keep it valid.
Do not upload official records to a link in a surprise email. Check the change with the office that issued the document.