[These are sample apology letter which can be used in any kind of partnership and to end this partnership due to some valid reasons. You should show an appropriate cause. You can modify this format as your requirement.]

Date…

Partner name…

Company name…

Address…

Sub: Apology Letter for Finishing Partnership

Dear (name) I’m writing to you to give you an official letter for our business partnership finishing.

A few years ago we started a business together and it was good for a while but then we started to lose money. At first, it was small amounts but then it got bigger to the point that I thought I wasn’t going mad. I hired a private investigator and he looked at every member of my employees. I am very disappointed when he told me you are the one stealing from me and how much. Its official my lawyer gave me the documents today so now you are no longer part of this company I am a single partner now.

Yours sincerely,

Your Name…

Contact no. and signature…

Dear Friend,

I am fine and I hope you are doing fine too. I wanted to talk to you about what happened the other day. I know I panicked and I am sorry for that but I think it’s time now. Our partnership had been going on for like ten years counting this one as the eleventh one. I always trusted you with all my heart and soul but when word came up about you stealing from the company I couldn’t believe it. I wanted to see proofs and unfortunately, I saw them. It’s okay if you needed money, I hope instead of stealing you would’ve asked me for it.

As the saying goes “There is no crying over spilled milk” I don’t think crying over what happened is of any use now. What happened? I promise it will not affect our friendship but I had no choice other than to end my business partnership with you. I hope you will find it in your heart to forgive me.

Thanks,

Your name…