(CN) – Special Counsel Robert Mueller on Thursday filed a request for 70 blank subpoenas in the Virginia court presiding over one of two criminal proceedings involving former Trump campaign chairman Paul Manafort.

The two-page filing doesn’t offer much in the way of details, but each subpoena orders the recipient to appear at the federal courthouse in Alexandria on July 10 at 10 a.m. to testify at Manafort’s trial on charges stemming from Mueller’s investigation of Russian meddling in the 2016 presidential election.

Although Manafort faces no charges related to the Trump campaign, he is accused in cases filed both in Alexandria, Virginia and Washington, D.C. of hiding the work he did for and the money he made from a Russia-friendly political party in Ukraine and former Ukrainian president Viktor Yanukovych.

In Virginia, he is also accused of concealing foreign bank accounts, falsifying his income taxes and failing to report foreign bank accounts.

In Washington, Manafort faces counts of conspiracy to launder more than $30 million, making false statements, failing to follow lobbying disclosure laws and working as an unregistered foreign agent.

The request comes one day before Manafort is expected to appear in a Virginia federal court where his attorney, Kevin Downing, will make a case for dropping of several counts against his client.

In a filing Monday night, Downing requested a hearing to air his concerns that Manafort’s chances at a fair trial have been spoiled thanks to media reports featuring leaks from anonymous government officials.

This story is developing …