To state clearly that something is true, correct, or officially agreed upon.
“I am writing to confirm our meeting scheduled for next Tuesday afternoon.”
“Please confirm your attendance by replying to this email before Friday.”
This is one of the most common purpose verbs in CELPIP correspondence, appearing in phrases like 'I am writing to confirm...' Distinguishing 'confirm' from similar purpose verbs such as 'request' or 'clarify' is key to answering the 'why was the letter written' question correctly.
Synonyms: verify, affirm, validate