Answer:
Dear [BOSS],
I wish to offer my apologies for not being able to report to work on [00/00/0000] as expected of me. I understand my unannounced absence from work brought a bought inconveniences to you and the entire team.
My absence was due to [YOUR REASON]. Attached is the documentation on the matter and I regret my actions. I will not give excuses for having failed to communicate at the right time about my absence I understand this is wrong of me. In future, I will ensure that I communicate in advance.
Thank you for your support and understanding.
Regards,
[NAME]
