I hear you but I'm not prepared to do that. If they were to ask me about it that's fine but I'm not prepared to ask them permission to cash it because of the setup of the company. Also, owners are religious so it's not really an issue of 'making a kiddush hashem'.
But what if for some reason this other offers falls through. I cash the bonus check and in 2 weeks something else comes up. Why is that better? Am I then obligated to pay it back?
Actually, kiddush Hashem applies to actions done in front of frum people.