How to sign the PAN application i.e. Form 49A/49AA?
​The applicant has to provide signature at three places in form 49A/49AA. If the applicant cannot sign, then the Left Hand Thumb impression of the applicant should be affixed at the place meant for signatures and should be attested by a Magistrate or a Notary Public or a Gazetted Officer, under official seal and stamp. Three signature/thumb impressing are to be provided as follows:

One signature / left hand thumb impression should be provided across the photo affixed on the left side of the form in such a manner that portion of signature/impression is on photo as well as on form.
One signature /left hand thumb impression should be provided within the box provided on the right side of the form. The signature /thumb impression should not be on the photograph affixed on right side of the form.
One signature /left hand thumb impression should be provided at the end of the form in the declaration part. Signature /left hand thumb should be within the box provided for signature /left hand thumb.
Applications not signed in the given manner and in the space provided for signature are liable to be rejected.