Apology Letters for Not Meeting Expectations

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}

Dear {Recipient},

Please accept my apologies for not attending your party {last night/yesterday/etc.}. I wanted nothing more than to celebrate {occasion} with you; sadly, {reason} hence I couldn't make it.

I would have {called/texted}, but I knew you were busy with {host/hostess} duties and I didn't want to bother you. I'm sure all your guests had a wonderful time. I'm a little jealous, actually.

Anyway, {I wish you a happy birthday/congratulations on your well-deserved success/etc.}! Let's meet up soon, shall we?

Warmly,
{Your Name}

Dear {Recipient},

I'm sorry I failed to {file the records/enter the data/schedule the appointment/etc.} that you requested earlier. I didn't mean to be negligent, but {reason} prevented me from completing the task.

I'm not trying to come up with an excuse, though. Please let me know what I can do to sort this out. I'm willing to {stay back after office hours/reach out to the client/etc.}.

Sincerely,
{Your Name}

Dear {Recipient},

I'm sorry I didn't donate to your fundraiser for {cause}. I would have if I could, but between you and me, money has been tight lately.

Please let me know if I can help in some other way. I may not be able to contribute financially right now, but I can volunteer if needed.

Kind regards,
{Your Name}

Not Supporting Child Fundraiser

Dear {Recipient},

I'm sorry my family wasn't able to support your {son/daughter}'s fundraiser for {cause} last {day of the week}. We were all looking forward to an {afternoon/evening} of {shopping/karaoke/games/etc.} for a good cause, but unfortunately, we had to {stay at home/miss all the fun} due to {reason for absence}.

I have enclosed a check for {amount} as our contribution to the fundraiser. Your {son/daughter} has a good heart and I hope {he/she} continues to help others!

Sincerely,
{Your Name}

Dear {Recipient},

I apologize for failing to show up to my scheduled interview on {day of the week}. I know this reflects poorly on me as a job candidate, but I assure you I wouldn't have missed such an important appointment unless there was a very good reason.

Unfortunately, {reason for missing interview}, thus I had no choice but to miss my interview. I hope you'll consider rescheduling me. I'm really interested in the position as {reason for interest}.

Thank you for your kind understanding.

Sincerely,
{Your Name}