As it stands Creditors owed monies from Russia have little or no options to collect at the moment. 

This may make any portfolios of debt collection you have in Russia even more difficult to collect.

Current financial restrictions on the country's financial infrastructure mean that outstanding debts may just have to be placed on hold during the extreme current climate we are seeing. 

You may want to consider a 'Humanitarian Hold' on these debts due to the unforeseen and unfortunate circumstances  we are currently seeing unfold before our eyes.