Hi Ahmed's email is is a scammer. Please be careful with this person. He told me to deliver the personal check in 1 to 4 hours and I haven't receive.
Its your fault for engaging in risky transactions like money exchanges and so forth which are completely banned on these forums. Try to avoid anything not allowed on these forums and you will be fine.
Is this person a member here? Can you post a link to his/her profile? Was the deal a money exchange? or something else?