No, a credit card that was stored in iTunes store.
Beware: I forgot my new password for this store and tried a couple. To do this in the AppStore, you need to click on "buy", and I chose Adobe Elements. After I input the right password and hit OK, the program started downloading and my card was immediately charged. I aborted the download and asked iTunes to reverse the charge. Will see what they have to say with 0 bytes downloaded. Yesterday, when I did the same for Lion, I first got to the payment screen, input the credit card identifier number and only after that got to the download.
We must be careful with this site.


Alex
3.1 GHz 13" MacBook Pro 2015, 8 GB RAM, OS 10.11.2, Office 2011, TimeWarner Cable
2.8 GHz Xeon Mac Pro 2010, 16 GB RAM, OS 10.11.2, Office 2011, LAN