If you have been assigned as an authoriser to a form, you will have the ability to approve or reject the submitted form.
From Home, select Forms.
In the Submissions tab, select All Categories.
Tap on the Filter icon.
The Filter page will appear.
Tap on the checkbox inline with Pending my approval, and Apply.
All the pending forms that require you to authorise will be listed.
Select the form you wish to authorise.
You will have the options to Approve or Reject the form.
Tap Approve.
A verification code will be sent to your phone number.
Input the code and tap Submit.
A success prompt will appear, tap Close.
The form status will be changed from Pending to Complete.

Click here to learn how to reject a form.