There are no bigger invitations to a swindle than sweepstakes offers, free prizes or special giveaways. Don't believe anyone who tells you otherwise. For example, a loan offer that includes something for free usually means you are going to pay for it in some other way. When the offer sounds too good to be true, it almost always is. Avoid persons who pressure you into making a quick decision, or want you to provide them with money quickly.
Urgency is always a coverup for getting bilked.
Likewise, be careful of anyone that asks you to trust them. Always remember, you are dealing with a stranger no matter how nice a person they may appear to be.