Utilize your financial knowledge, give your answer or opinion to the input question or subject . Answer format is not limited.

Passing money through a different account to avoid cash pay-in fees
Let me do the math. .6% * (not large) = really tiny. Since "not large" = "small" , etc.  I suggest that even a small chance that you need to explain this to anyone in the future is a sign to avoid the risk. Yes, there are times that it's illegal. A real estate office may not deposit escrow funds into anything but a segregated escrow account.  In your case, even if legal, it messes up 'the books' and can cost you more in grief than the 'tiny amount' saves you in cash.