Another controversial frustration for Pro-Line players in Atlantic Canada is the occurrence of Atlantic Lottery (ALC) 'capping' wagering on combinations and, on rare occasion, individual selections. This occurs when a significant amount of wagering is placed within a short span of time, typically on a specific combination of outcomes. The reasoning behind having such caps is to dissuade professional, or 'block', bettors from attempting to take advantage of potential flaws in the posted odds, and thus limits the liability for the corporation on a given combination of outcomes. Typical block betting behaviour involves placing large sums (often thousands of $) on a very small amount of combinations, trying to focus on perceived flaws as much as possible. Ultimately the Pro-Line game is meant to be recreational and not for professionals. Unlike online-only betting operations where all transactions must be submitted by identity verified accounts, Atlantic Lottery operates across a network of retailers where wagers are accepted anonymously, thus making it more susceptible to such 'block' bettors. The capping of combinations serves to limit pro-betting while keeping all outcomes open for betting, in any other combination. If a combination of outcomes is capped, any subsequent transaction submitted to the system attempting to wager on this particular combination is rejected. This can be an annoyance to non-professional (casual) bettors legitimately trying to wager on a capped combination, but experienced bettors have come to understand the reasoning and adjust their wagers accordingly.