If the transaction with you is successful, I will enclose a few cards, so if you can give them to my American friend, please give them to me. I'm not forcing you to do so.
If we succeed in the deal I will enclose some cards. Please give them to your American friends, if you can. It's alright if you could just help a little.
If I can succeed in a deal with you, I would like you to give some of them to your friend in the US as I will enclose some cards. This means that I am not forcing you to do this.