“As POA for my mother, I am filing a paper copy of her 2015 Federal return along with an IRS 2848 and a copy of the POA. Is a PTIN required for the 2848 Form?

If I file eFile rather that mail return in, I would need to submit a copy of the POA with the return and within 3 days of acceptance of the return send in Forms 2848 and 8453 along with another copy of the POA. Not sure which is the better way to go since mailing just return, 2848 and POA seems simpler but, I like the eFile notification of acceptance but, in either event,  does or, does not Form 2848 need a PTIN.