Used to politely ask someone to do something as soon as they reasonably can.
“Please respond at your earliest convenience so we can resolve this issue.”
“I would appreciate a confirmation at your earliest convenience.”
This is a classic formal closing phrase for CELPIP Writing Task 1 emails that need a timely reply, such as complaints or urgent requests. It is more polite than saying 'as soon as possible,' which can sound blunt in a formal context.
Synonyms: as soon as possible, at your soonest opportunity, promptly