The Russian government's top legal office wouldn't accept paperwork from United States law enforcement in the case, and the company has already hit back at Mueller by demanding more evidence and information.
On Friday, prosecutors asked a judge to postpone the arraignment of Russian business Concord Management scheduled for next week.
Prosecutors also disclosed that they had sought to deliver summonses to Concord and the Internet Research Agency through the Russian Prosecutor General's Office.
The indictment against the three companies and 13 individuals was unveiled in February, and marked a significant development in Mueller's investigation into Russia's role in the 2016 election.
The prosecutors said in Friday's filing that they don't know whether one of the companies indicted alongside the Russians was served with a summons in the case.
"The [U.S.] government has attempted service of the summonses by delivering copies of them to the Office of the Prosecutor General of Russian Federation, to be delivered to the defendants".
Mueller's office sent Concord's summons to the attorneys on April 20 along with a request to clarify whether they could accept a summons on behalf of their client. "To the government's knowledge, no further steps have been taken within Russian Federation to effectuate service".
Mueller's team has been unable to confirm delivery of summonses and has received a request for undisclosed details about the case.
US law says that defendants, whether located in the USA or in another country, must be served before a case can proceed unless a judge becomes involved. The Associated Press and other news organizations are asking a judge to unseal records in Mueller's Russian Federation investigation. "Also requested by defense attorneys was information about "'each and every instance" from "1945 to present" where the United States government "engaged in operations to interfere with elections and political processes in any foreign country'" according to the prosecutors' court filing. They did not immediately declare whether they could accept service for the company, but asked Mueller's office for a host of information, including potential witnesses and discovery, according to the filing.
Dubelier did not immediately responded to a request for comment on the filing and Joshua Stueve, a spokesman for the Special Counsel's Office, declined to comment.