I'm so sorry I woke you up. I didn't mean to {be so loud/call so early/etc.} Also, I {forgot that you work nights/was really excited/etc.}.
I hope that you sleep well tonight, no thanks to me!
Download this apology letter template — free!
Formatted and ready to use with Microsoft Word, Google Docs, or any other word processor that can open the .DOC file format.
Index of letter of apology templates