Since you booked it under your credit card, you may likely be able to check in - Info below quoted from pricelines's terms and conditions "Upon check-in, guests must present a valid ID and credit card or, in the hotel's discretion, debit card, in their name that is consistent with the transactional details provided to priceline.com (the amount of available credit required will vary by hotel). Debit cards may not be accepted" I would bring a copy of your friends ID...imo