Apology Letters for Billing Errors

Dear {Recipient},

It has come to my attention that you were charged twice for order number {number} due to {reason}. I
apologize for the mistake and any inconvenience this may have caused you.

Rest assured that our accounting department has already voided the second transaction. Please note that it might take {number of} business days for this change to reflect in your account.

Thank you for your kind understanding and we look forward to your continued support!

Kind regards,

{Your Name}

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