Have you ever noticed a Tweet from your Twitter account, which you did not tweet!
When people come across such situation they straight away think that their account has been hacked. But its not the case always.
There are many services built around Twitter and most of them use Twitter API for log in or authentication purpose. While using such services, be careful while you share your Twitter ID and Password. Read the policy properly. Recently I saw a service which required my Twitter ID and Password, to let me use their service. With curiosity I read their policy page. There they had clearly mentioned that, they will periodically use our Twitter account to Tweet about their service, for promotional purpose!
After reading this policy, I started searching for the policy page of “Instantly Increase your Twitter Followers” kind of services. And found that many of them had the same policy. After reading this policy, I started noticing those automated, promotional tweets from some peoples or tweeples account. Most of them never know that their Twitter account is being used by others.
If the service you are using is intentionally evil, then they will not let you remove yourself from that service. In such case, use your Twitter account settings > Connections tab page to disallow any of these services from using your account. And change your password, for more security.
The above image is just an example and it doesn’t showcase any fraud or scam companies that are trying to misuse your Twitter a/c.
Of course, not all services that use Twitter API for authentication are bad. Most of these services respect users privacy, but some services are misusing this facility. So do not hesitate to kick them off, from accessing your account.
Even worst cases, have you shared your Twitter username and password with any service, which do not use Twitter API for authentication? If yes, then first change your password without fail and never give your username and password again.
Twitter allows only trusted parties to use their API, but still no system is 100% perfect, so no exception to Twitter.