Russian citizens willing to return home after fighting in a part of the Russian-terrorist troops in Donbas should sign contracts to be despatched to Syria. This applies both to the Russian Armed Forces soldiers and contractors.
According to the Information resistance website, as of now a slight number of people are willing to sign the contract, both among the Russian servicemen and Russian contractors in Donbas.
The "DPR" and "LPR" have special groups of Russian FSB (Federal Security Service) to "reassure" militant commanders not obeying the orders to cease fire at the front. During these "reassuring talks" the most common threat is imprisonment and physical violence.