Eight months after joining the Board of Directors at Pitney Bowes Inc. (PBI), a shipping and mailing company, Jill Sutton has quit without notice, citing significant disagreements over how the company is operated.

In her resignation letter— which Pitney Bowes did not disclose for six days— Sutton said she resigned immediately because:

“...of disagreements related to the Company’s operations, policies and practices in respect of the Board’s corporate governance on critical matters.”

Sutton was an independent director appointed in connection with Pitney Bowes’ agreement with Hestia Capital, Kurt Wolf’s activist hedge fund.

Sutton says following her resignation, seven independent directors have resigned or retired in just six months.

Notably, Ms. Sutton’s profile as a Pitney Bowes’ director remained live on the company’s website after her resignation became effective.