Required green tick mark in siganture appearance

In-document visualizations of the signature validity have been deprecated more than a decade ago. In the current PDF specification they actually are forbidden.

For references see this stack overflow answer. 

Adobe Acrobat still supports these visualizations for backward compatibility reasons for signatures created in the way Adobe Acrobat itself used to create signatures before version 6. There is software around that still signs in this way. Chances are, though, that even Adobe products eventually will stop showing the green tick or the red cross to illustrate the validation result.

If you really want a green tick in your signature, simply add an image of such a tick as background image to your signature appearance.

i want to know about how to enable green tick mark in signature appearance

By @om prakashs4007625

You posted to the orphaned Acrobat Reader Mobile (beta) forum. If your question about the beta version? If not, we can move your post for you.

Jane