Sure - ACARS can be the final arbiter.
Until there is a discrepancy. As an example - paycheck.
Like banks make mistakes (wrong entries) - beancounters make mistakes too.
Easy to say "computer error" as an excuse - I call it "operator's fat fingers".
Computers are very accurate and failproof. Fingers are NOT.
xxx
I logged my flying with a little pocket book.
Entering just total block time, hours and tenth. And a flight log page number.
A couple of times, some errors. Manual flight log entries became the reference.
In agreement with you. It depends on airline management policies.
xxx
Happy contrails