To identify and check such frauds, one needs to emphasize on diligence of processes, in addition to specialized fraud management systems. Traditionally, fraud management systems receive feeds from the network or from mediations systems. However, in case of showing an ISD call as a local call, for example, the fraud or the inaccuracy occurs in the billing system, much after the fraud management system has received its inputs. As such, the fraud management system may not detect this discrepancy at all. This leads to the obvious conclusion that a diligent process needs to be set up by service providers to check fraudulent activities in all BSS/OSS sub-systems. Also, each BSS/OSS sub-system needs to support some level of fraud tracking and reporting.

Moreover, much of the standard fraud management concepts could be used to tackle such frauds. For example, illegal call landing can be detected through certain patterns such as immovable SIMs, abnormal call ratios, etc. The only difference would lie in the way the frauds are addressed. While operators would follow a certain process with subscribers performing fraud, a completely different set of processes and sensibilities would have to be followed with fraudulent service providers.

SS7 signaling data can be used to address the problem quite effectively. It is possible to do analysis on SS7 signaling-based records to unearth disguising of calling party number by other operators.