contraband smuggling, human trafficking, and illegal narcotic trafficking are problems in the porous areas of its border regions with all of its neighbors (Argentina, Brazil, Chile, Paraguay, and Peru)

Bolivia-Chile: despite tariff-free access to ports in southern Peru and northern Chile, Bolivia persists with its long-standing claims to regain sovereign access to the Pacific Ocean

Bolivia-Peru: despite tariff-free access to ports in southern Peru and northern Chile, Bolivia persists with its long-standing claims to regain sovereign access to the Pacific Ocean; smuggling of archaeological artifacts from Peru to Bolivia, illegal timber and narcotics smuggling, human trafficking, and falsified documents are current issues 

Bolivia-Brazil: the Roboré Accord of March 29, 1958 placed the long-disputed Isla Suárez/Ilha de Guajará-Mirim, a fluvial island on the Río Mamoré, between the two towns of Guajará-Mirim (Brazil) and Guayaramerin (Bolivia), under Bolivian administration but did not resolve the sovereignty dispute

Bolivia-Argentina: contraband smuggling, human trafficking, and illegal narcotic trafficking are problems in the porous areas of the border 

Bolivia-Paraguay: on April 27, 2009, the president of Argentina hosted the presidents of Bolivia and Paraguay together with representatives of the five other guarantor states -- Brazil, Chile, Peru, the US, and Uruguay -- to the signing for the Final Record of the Boundary Commission in execution of the 1938 Peace Treaty between Bolivia and Paraguay

Senegal-Guinea-Bissau: rebels from the Movement of Democratic Forces in the Casamance find refuge in Guinea-Bissau

Armenia-Azerbaijan: tensions existed for years over the break-away Nagorno-Karabakh region and the Armenian military occupation of surrounding lands in Azerbaijan; Azerbaijan seized part of the enclave during six weeks of fighting in 2020 and the remainder in a short conflict in September 2023; in October 2023, Baku and Yerevan began preliminary discussions on a peace treaty, the demarcation of borders, and full normalization of relations; nevertheless, concerns persist in Armenia that Azerbaijan could invade in order to force the establishment of a transit corridor to the exclave of Naxicvan (Nakhichevan)

Azerbaijan-Georgia: a joint boundary commission agrees on most of the alignment, leaving only small areas at certain crossing points in dispute; consequently, the two states have yet to agree on a delimitation or demarcation of their common boundary; one area of contention is where the international boundary should run through the 6th-13th Century David-Gareja monastery complex

Azerbaijan-Iran: in recent years, tensions between Azerbajian and Iran have risen in part because of warming ties between Azerbaijan and Israel, and Baku's claims that Tehran has backed Armenia over the disputed Nagorno-Karabakh enclave

Azerbaijan-Russia: Russia has complained of cross-border smuggling

Azerbaijan-Turkey: none identified; as of 2023, Turkey and Armenia were discussing normalizing relations

Caspian Sea (Maritime Boundary): Azerbaijan, Kazakhstan, and Russia ratified the Caspian seabed delimitation treaties based on equidistance, while Iran continues to insist on a one-fifth slice of the sea; bilateral talks continue with Turkmenistan on dividing the seabed and contested oilfields in the middle of the Caspian

local border forces struggle to control the illegal transit of goods and people across the porous, undemarcated Armenian, Azerbaijani, and Georgian borders