A lawsuit by a Waltham-based company over the state’s apparent refusal to provide them requested correspondence is just the latest litigation involving the business, a review of court proceedings shows.

Global Partners, the company which currently operates several of the state’s 18 highway service plazas, sued MassDOT last week demanding the release of “key documents,” which they say are “tied to the controversial award of a 35-year service plaza lease.” The lease in question was approved by the MassDOT Board of Directors at their regular meeting in June over the objections of Global, and was awarded to Dublin-based convenience store chain Applegreen.

Their lawsuit, filed in Suffolk Superior Court on August 11, seeks to have a judge order the release of correspondence between Applegreen

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