If so, there is a good chance that you've had a True Twit Validation request. These requests are sent to you via DM (Direct Messages) and you are asked to click on a link. The message looks like this [Insert Name Here] uses TrueTwit validation. To validate click here: [link to truetwit.com] and those new to Twitter often fall for this trap!
Some people will even sign up for TrueTwit and make the problem worse by becoming spammers themselves! You do not want to do that because TrueTwit is actually a scam! It's a spam scam of epic proportions!! Please take a few moments and read through my web pages and do your own research too. You will discover that TrueTwit is not what it appears to be and you will learn to stay away from it forever. Most importantly, you will learn why you should never click on a TrueTwit validation link.