Months ago, I have secured my Gmail accounts through using Google verification codes since I use different units when at home and at work. My bad! I verified it using the mobile number that the Company where I am currently employed has given me.
This code is a unique set of letters and numbers that identifies you as the creator and owner of your Gmail address. It is either verified through SMS or Voice Call.
Now that I’ve submitted my resignation, I need to get it stopped by removing the verification codes. After few tries, I finally did it by turning off 2-step verification.
1. Visit the Using 2-step verification page under your Google Account settings. Sign in with your username, password, and verification code if prompted.
2. Click Turn off 2-step verification.
3. A pop-up window will appear to confirm that you want to turn off 2-step verification. Click OK.
You can also edit the phone number that you want to use by click EDIT on the same page, but this should be done with the verfication code still on.
In my case, I have turned it off since I do not carry my mobile phone 24/7 with me.