A state House and Senate investigative committee plans to subpoena Title Guaranty of Hawai'i executives and ask them whether the company has had improper access or influence with the state Bureau of Conveyances.

The committee, which is examining mismanagement at the bureau, agreed yesterday to subpoena Title Guaranty president Michael Pietsch and three other executives along with all contracts, agreements, invoices and other proposals between the company and the bureau over the past 25 years.

The committee also agreed to subpoena the executive director of the Hawai'i Land and Title Association and a former Island Title executive who has described preferential treatment and access by title companies at the bureau.