Student loan applicants submit the X12 135 transaction set to lending institutions or loan servicers to apply for educational financing. The transaction set is typically initiated by the applicant (or their authorized representative) in response to a loan program’s application requirements. The document contains mandatory segments including the ST (Transaction Set Header) for envelope information, BGN (Beginning Segment) to establish the application context, and SLI (Specific Loan Information) to detail the requested loan terms and amounts. Supporting information flows through the DB (Disbursement Information) segment to specify how funds should be distributed, while the ENT Loop accommodates multiple entities such as the applicant, co-borrower, and school, each with associated enrollment and financial details captured through ENR (School Enrollment Information) and FNA (Financial Status Information) segments.

Commonwealth Education Finance, a student loan servicer, receives completed 135 transactions from applicants seeking federal and private loan products. For example, when a student at State University applies for a $25,000 student loan, the application data—including the student’s identification, school information, requested disbursement schedule, and any co-signer details—travels via the 135 transaction set from the applicant’s submission portal to Commonwealth’s processing system. The transaction captures the student’s name and demographic data through the IN1 and DMG segments, the school’s enrollment status through ENR, previous loan history through the PLI Loop if applicable, and contact information for the school’s financial aid office through the N1 Loop, enabling Commonwealth to evaluate the application and determine eligibility.