If they say no, they are probably a scammer. You should always use the "trade" option with the user that is trying to gift you back and forth. There isn't much one can do when a player does this because MSP doesn't have a solid, clear rule against it. Do not do this unless you personally know who you are talking to! It is likely that whoever is trying to bargain with you is going to end up scamming you, as they will block you after you give them your side of the deal before they can fulfill theirs. Typically, the item scammers will offer to trade wishlist gifts or to watch your movies if you give them a wishlist gift first. Scams for stealing StarCoins and items are more common than scams for stealing accounts. If the situation is continuous or threatening, you should contact MSP.
If someone tries to tell you to change your password or email, report and block them. Don't trust anyone when they ask you to change your password/email, or to give it to them. Then, they will steal your account because you trusted them. They will always talk to you, compliment you, or like your stuff to the point where you trust them. Another tactic scammers use is pretending to be nice.
If they say no if you ask them to get you a VIP Certificate code instead, they are almost certainly a scammer. In most cases, the hacker/scammer will send items to themselves or change the account's password, therefore locking the original owner out. Hackers/scammers may also message players and say that they are giving away free VIP and in order to activate the VIP, they need your password to log onto your account. Do not believe someone when they claim to be a staff member! Real MovieStarPlanet staff will have a "MODERATOR" badge across their avatar on their profile when you click on them. They might also try to get you to change your password to one they give you. They do this by pretending to be an MSP staff member and asking you to set or change the e-mail linked to your account to something else. Sometimes, scammers will go as far as to try and take your account. Please be careful and do your best to avoid them at all costs. The following lists will explain some of the tactics used by scammers.