Third Party Collateral / Third Party Applicant represents third Party Collateral or Third Party Applicant refers to security or support provided by someone other than the primary borrower. In underwriting, it provides business and banking context that supports facility structuring, risk assessment and credit-decision documentation. The practical credit value comes from enforceability and control, not only from the value entered in the system. For example, the underwriter may use it to understand borrower behaviour, facility need, banking arrangement and the quality of supporting documents. It matters because the same borrower can look different depending on banking arrangement, transaction behaviour, documentation quality and business context. The common caution is to document the source, date, assumptions and credit impact so the term does not become a vague narrative label.