Hello Stephen,
Thank you for your question about this snipe. Because we do not keep a comprehensive log for free snipes, we cannot tell you for certain the details behind this snipe. Our job is to place the snipe, not to nail down all of the various account issues, although we are able to determine the reason about 90% of the time. Unfortunately we just can't keep logs for all of the free snipes.
Given your message, however, if this is a repeating occurrence as you indicated, it is almost surely that you need to update your credit card with eBay, or verify your identity with their call-in system. That is the most common reason.
We hope we have resolved this to your satisfaction. Please advise if we can help with anything else.
bidslammer