Because of increased focus on the Intellectual capital, particularly Patents and with the mergers and acquisition of the business entities, the Patent due diligence is increasingly showing its importance. Further, also in the patent licensing deals, Patent due diligence plays an important role in decision making. Patent due diligence is the method by which the Intellectual property, particularly patents are analysed in terms of Renewal, IP Ownership, Patent history etc. Not only it covers the procedural diligence rather the analysis also imbibes the technical aspects such as any other incremental invention or any other technology patent that might restrict the usage of the patent under analysis. TSR is specialized, both in procedural as well technical, in providing Patent due-diligence report. We thoroughly analyse the Patent and all its relevant family members and other closest prior arts to provide full detailed tool for a rationalize decision making.