PAN Application Acknowledgement Receipt (Form 49A. No it is mandatory to fill out PAN application form in Black ink.You must focus on Clear and right information in form. Copy to be kept with application. Tax Invoice cum Acknowledgement receipt of PAN Application (Form 49A). The applicant is requested to save and print this acknowledgement. Find Planning application forms at Planning Applications. Form 49A is the official application form for obtaining a PAN card. Read our article to learn all about it.