According to CCBill if third party tracking data is not allowed and IP tracking is switched off, then there's another mechanism of tracking with lasts for 24 hours.
http://ccbill.com/cs/wiki/tiki-index...+for+a+sale%3F
"We track consumers primarily through a Cookie, in this case a Cookie is an Internet tracking device that is saved in a browser then tracked before and after a consumer sale. This Cookie can track anywhere from 3 (default) to 255 days depending on Sponsor Program settings.
If the consumer does not accept third party cookie tracking data we have a redundancy in place that will track the sale for that consumer for 24 hours."