I've booked a Cebu Pacific one-way ticket for my maid at the end of June thru their website. I didn't give out any credit card copy for my maid which is no problem. Don't worry. Remind you to delete all credit card details in the ticket summary before give it to her.
I also found the price in their website is different, sometime is $680, sometime is $480. I finally booked one at $300 + tax = total $555 only. So suggested you check few more days before confirm to pay.