Chart of Validity SegmentsFigure 3.12.179–12 shows a chart of validity segment for long entity. If no match is obtained, the account is returned to its original slot on the invalid segment. The process starts: Input to Service Center Computer, then proceeds toEnterprise Computing Center at Martinsburg/Enterprise Computing Center at MemphisOutput SSN and Name Control compared with record on DM-1 tape (SSA) If SSN and Name Control match: validity digit of 0 assigned, follow process AIf SSN and Name Control mismatch; validity digit of 1 assigned, follow process B.Process A: Attempts to locate SSN on valid segment SSN found, follow process CNo record of SSN, transaction unposts.Process C: Checks Name Control Name control match, then posts to TPs account on valid segment if there are no other unpostable conditionsName control mismatch, follow process DProcess D: Is transaction long entity and first four characters of the first name also match? If yes, posts to TPs account on valid segment if there are no other unpostable conditionsIf no, transaction unposts.Process B: Attempts to locate SSN on invalid segment.If SSN found follow Process E:If no record of SSN, transaction unpostsProcess E: Checks Name Control If Name Control match, follow process FIf Name Control mismatch, transaction unpostsProcess F: Posts input to TP's account on invalid segment if there are no other unpostable conditions Freezes refund (if any) and issues notice.