Facebook accounts have now strict against spammers. Inorder to reduce spamming, multiple account creation and other illegal activities, Facebook now brought into action a verification system, you got to verify your facebook account to avoid captcha. All those un-verified accounts will be asked to enter captcha whenever they add a friend, send message or put a link.
Also check how to delete your facebook account permanently and to Use Facebook fan page in the right way.
Steps to Verify your Facebook profile
Login to your facebook account :
http://www.Facebook.com Click on this link to open the verification process :
http://www.facebook.com/confirmphone.php Select your country and enter your mobile phone number
Click on the Confirm button to send the Facebook confirmation code to your mobile phone.
verify code How to verify Facebook account
Facebook Confirmation code
After you receive the message from Facebook enter the confirmation code, onto the text box and click on “Confirm” button.
Your Facebook account is now confirmed and you can avoid captcha process while using Facebook.