Apology Letter For Taking Client
Dear {Recipient},
I'm sorry things ended between you and {client}. I know you think I took your client from you, but I would never do that to a colleague. {Client} explained to me that their contract with {you/your business} had already expired and they chose to do business with a different {company/freelancer} after that.
Even though we work in the same industry, I never saw you as competition and I would never resort to underhanded tactics such as stealing other people's clients. I wish you all the best.
Respectfully,
{Your Name}