Yes, right, the first occurrence, the other occurrences don't mention "purported".
From the first page of your linked court document:
"J.P. Morgan Chase Bank, N.A. (as purported Successor-in-Interest to Washington Mutual Bank, WaMu Capital Corp., Long Beach Securities Corp., and WaMu Asset Acceptance Corp.)"
pur·port verb past tense: purported; past participle: purported
appear or claim to be or do something, especially falsely; profess. "she is not the person she purports to be" synonyms: claim to be, profess to be, pretend to be