A system and a method for validation of transaction data are disclosed. A rules engine in the system and the method is used to quickly and accurately deduce whether or not a transaction is a candidate for flagging with additional identification data, and a loyalty engine is used to quickly and accurately track and manage an entity relating to a transaction. In the system and the method, through compression and optimization, separate logical rules originally built are combined into an aggregate of compressed rules shared across a plurality of validations, such that the aggregate of compressed rules in the rules engine and the loyalty engine operates in memories of computing machines hosting servers. The system creates modularity and nimbleness with an internal instancing system and a dynamic routing node to multiple active instances. The multiple active instances of the rules engine and the loyalty engine support real-time updates and thus facilitate higher uptime capacities.