Well this comes as no suprise:
Voting with absentee ballots and voting on pressure from authorities
One of the major complaints that experts and voters alike are voicing is the rampant use of absentee ballots, which are difficult to trace and pin down to a particular individual. As electoral monitors from the SPS headquarters in Moscow have pointed out, a disproportionate share of absentee ballots are being used in polling places. Traditionally, such ballots are only used for individuals living in a different region than where they are registered to vote, and their widespread use in this election is unnecessary and alarming.
At polling station Number 1697, in the Autozavod district of Moscow, 40% of registered voters cast their decision using an absentee ballot. The voting process was administered by an observer from the pro-Kremlin United Russia party.
In a press-release, Yabloko announced that their observers flagged down and stopped a bus on the streets of Moscow. The vehicle was driving its passengers between polling stations, where they were voting multiple times with absentee ballots. Ivan Bolshakov, a candidate on the Yabloko party list, commented that the passengers were workers from the “Magnet” store from the city of Kovrov in the Vladimirsk oblast. They were apparently invited for an outing to Moscow, issued absentee ballots, and told to vote for United Russia. Before it was stopped, the bus had already visited several polling locations.
Observers from SPS noted a similar incident with a bus-load of people voting with absentee ballots in Eastern Izmailovo.
In the city of Slavyansk-na-Kubani, in the Krasnodarsk Krai, observers of the KPRF noticed a large share of university students voting under the direction of university vice-deans. The university officials were seen issuing absentee ballots to the students.
In St. Petersburg, employees of one vocational school and their families were being forced to vote for United Russia with absentee ballots, according to Yabloko. Janitors in the Golovinsk district of Moscow were under threat of dismissal, and were being told to receive absentee ballots and hand them over to their superiors.
In total, around 1 million 350 thousand absentee ballots were issued for the election, according to Nina Kulyasova, a representative of the Central Electoral Commission (CEC).