If you've forgotten the password to your Gmail account, you may recover your account by going to Gmail's web password recovery site and filling in their form.
Your Mobile Phone Number Has Been Changed
If you have changed your mobile phone number you can recover your account only if you remember your password. Head for this link to recover your account, a reset code will be sent to your alternate recovery address or phone.
Your Gmail Account has been Hacked
If your account has been hacked or compromised, Gmail offers a step-by-step recovery process that begins with a questionnaire. Click on the previous hyperlink to access the questionnaire.
Forgot Gmail Password and Security Questions
Unfortunately, if you have forgotten both your Gmail password and security questions, account recovery is basically impossible.
You Have No Recovery Options
Unfortunately if you have not registered a secret question which you remember, an alternate recovery email address or phone number to which you have access to receive a reset code, you cannot prove that you are the account's legitimate owner. Hence account recovery is absolutely impossible and there is no way around it.
Gmail Account Unaccessed for 30 Days
If you have not accessed your Gmail account for over 30 days, it may have been deleted from the Gmail server. Inactive accounts and the data stored within are usually impossible to recover. Unfortunately, if this is the case for you, you must create a new account, taking care to note your password and security questions in a safe place.
This document entitled « Gmail Account Recovery » from CCM (ccm.net) is made available under the Creative Commons license. You can copy, modify copies of this page, under the conditions stipulated by the license, as this note appears clearly.