Russia's special phytosanitary regime on Belarusian agricultural products was the result of a number of violations on the part of Belarus' customs failure to halt contraband entering the country. These sanctioned products ultimately ended up on store shelves in Russia. Additionally, there were products that arrived without proper documentation supplied by third countries.
Belarusian partners promised to tighten control and by spring thier efforts produced positive results: 17 attempts to ship sanctioned produce to Russia were caught by customs. The cost of the goods seized amounted to 23 million rubles.
For example, on March 1, 2016, Belarusian customs detained two trucks laden with 38 tonnes of apples that had not been inspected by phytosanitary control without proper Phytosanitary and shipping documents, according to the customs committee of Belarus.
Improvements of control and monitoring of sanctions and quarantine have gradually led to a reduction of substandard and untested products on the market.
FruitNews article (Russian): http://www.fruitnews.ru/state-news/117-foreign-countries/45839-belorussiya-usilila-tamozhennyj-kontrol-produktsii.html