We've all received spam trying to sell us things such as prescription medications, cheap mortgages and internet gambling. Most people just hit delete and move on, but there are some scams that are a little more serious.

One of the most common is the Nigerian bank scam. Someone sends you an email pretending to have some kind of relationship to a government official who has recently died, most often in Nigeria. They claim to know about money that was deposited in a secret account that is not accessible to them. In exchange for paying the "transfer fees" and accepting the money in your account, you get to keep a large portion of it. Of course, there is no money and they just want to get your bank account information and the transfer fees you send them.

Other scams offer investments with huge paybacks. They always claim to be risk-free naturally, but once you've sent them your money it's highly unlikely you'll ever see any of it again, let alone profit. A similar scam involves credit cards for people with poor credit ratings. You send them a security deposit and processing charge and they send you a credit card. Unfortunately, once they have your fees you'll never hear from them again.

These scams can also effect legitimate businesses you might be dealing with. Because there is so much spam these days, the email services are working hard to filter it out. These filters can sometimes stop legitimate messages, however, and you may not receive something you wanted.

How To Sidestep These Scams

First, never reply to spam. This just tells the spammer that your email is in fact valid and the amount of spam you'll receive will quickly multiply. Some spam will even include a link at the bottom for removing yourself from their list. If it's a true spam email, don't use this - it just confirms your email address as well. If you did sign up to receive the email however, this is a legitimate way of removing yourself from future mailings.

Above all, never give your credit card number, bank account details or private data to anyone unknown over the Internet. PayPal, for example, and other legitimate online businesses will never ask for your password in an email. One common scam is to fake return addresses and tailor subject lines and content so the message appears to be from them or another financial institution 'confirming' your information. Don't fall for them.

Spam isn't an easy things to stop, but if you don't recognize the person sending you the message, and it sounds too good to be true, it probably is. Besides, how many dead Nigerian dictators with huge bank accounts can there really be?