At the time of her departure, the banker said she had "chosen to resign" and was "looking forward to" retirement. Deutsche declined to disclose the circumstances of her exit from its New York office.
A statement recently filed with US regulator Finra, which was made public on Wednesday and first reported by The New York Times, said Vrablic was "permitted to resign" after allegations of "undisclosed activities related to a real estate investment by the representative [Vrablic], including the purchase of the property from a client-managed entity, and the formation of an unapproved outside entity to hold the investment".
Vrablic's lawyer declined to comment. A spokesman for Deutsche Bank declined to comment on whether the real estate deal that led to her departure was the one involving Kushner.
Scalzi, a colleague of Vrablic's who stepped down at the same time and was also investigated over the Kushner deal, was "allowed to resign" in the same circumstances, a separate Finra filing said. His lawyer did not immediately respond to requests for comment.
Trump owed Deutsche as much as US$340m when he left office. Vrablic was his personal banker for several years and he publicly lavished praise on her, erroneously describing her as the "head of Deutsche Bank" and "the boss".