Phrases Complaints and Suggestions

I'm afraid there's been a mistake.

B2

Meaning

Politely pointing out an error.

Example sentences

John: Your invoice is incorrect.

Alice: Oh dear, I'm afraid there's been a mistake. I apologize for the error.

John: Can you please correct it?

Alice: Of course, I'll send you a corrected version immediately. Yes, I'm afraid there's been a mistake.