'attestation' originates from Latin, specifically the word 'attestatio,' where 'ad-' meant 'to' and 'testari' meant 'to bear witness.'

'attestatio' transformed into the Old French word 'attestation,' and eventually became the modern English word 'attestation' through Middle English.

Initially, it meant 'to bear witness to something,' but over time it evolved into its current meaning of 'a formal statement or evidence.'