Well, normally the system would only ask you to verify your login once every 30 days, for each browser/device that you use to login from.

However, there are a few possibilities that you may have to verify your login more frequently than required.

1. The website data in your browser storage may have been corrupted. This is probably the most common cause of this problem. The solution is simple - delete your browser's website data and login again. Your will be asked to veirfy again for the first login after clearing the website data, but subsequent logins will no longer require it.
   
   The following pages will provide you instructions on how to delete your website data.
   • For Chrome on PC
   • For Chrome on your mobile device (Android & iOS)
   • For Firefox on PC
   • For Firefox on iOS
   • For Firefox on Android
   • For Safari on iPhone/iPad
   • For Safari on MAC
   
   
2. Your browser may have a setting to either block cookies from OnRes, or delete your website data periodically or upon exiting the browser. Check your settings and make sure your browser is not doing anything that.
3. Your are browsing in private mode. After you close the private browser, all website data is gone, therefore next time when you login again from the private browser, you will be asked to verify your login again.