Dear Shabana, ideally, errors in thumb impression and signature can be only rectified if NBE asks you to. NBE will send a notification to your registered email and mobile number asking you to rectify the mistakes. That is when you can make the necessary changes during the correction window. Please keep an eye on your Registered Email and mobile number.

Hello,

You donot need to worry because FMGE provides time to rectify your mistakes.

Here is the dates for it:

Dates of FMGE application form 2019