Kuwait-Iraq: no maritime boundary exists with Iraq in the Persian Gulf; Kuwait has called on Iraq to resolve the domestic legal status of the 2012 Kuwait-Iraq Agreement to regulate maritime navigation in Khor Abdullah and ensure that the agreement remains in force  

Kuwait-Saudi Arabia: their maritime boundary was established in 2000 and has a neutral zone but its extension to Iran’s maritime boundary has not been negotiated

Serbia-Bosnia and Herzegovina: Serbia delimited about half of the boundary with Bosnia and Herzegovina, but sections along the Drina River remain in dispute

Serbia-Bulgaria: none identified

Serbia-Croatia: Serbia and Croatia dispute their border along the Danube; Serbia claims the border is the median between the current Danube shorelines, with the land to the eastern side of the median belonging to Serbia; Croatia contends that the boundary is demarcated according to historic maps, despite the river having meandered since then

Serbia-Hungary: none identified

Serbia-Kosovo: Serbia with several other states protested the US and other states' recognition of Kosovo's declaration of its status as a sovereign and independent state in February 2008; ethnic Serbian municipalities along Kosovo's northern border challenge final status of Kosovo-Serbia boundary; since 1999, NATO-led Kosovo Force peacekeepers under UN Interim Administration Mission in Kosovo (UNMIK) authority have continued to keep the peace within Kosovo between the ethnic Albanian majority and the Serb minority; in October 2021, NATO-led KFOR increased patrols along the border with Serbia to deescalate hostilities caused by a dispute over license plates

Serbia-Montenegro: the former republic boundary serves as the boundary until a line is formally delimited and demarcated

Serbia-North Macedonia: none identified

Serbia-Romania: none identified

Venezuela-Brazil: none identified

Venezuela-Colombia: dispute with Colombia over maritime boundary and Venezuelan administered Los Monjes Islands near the Gulf of Venezuela; Colombian-organized illegal narcotics and paramilitary activities penetrate Venezuela's shared border region; the border between the two countries was closed from March 2020 to October 2021 due to COVID, but goods and people fleeing poverty and violence continued to be smuggled from Venezuela into Colombia, and illegal narcotics and armed men flowed into Venezuela from Colombia; since the FARC disarmed in 2016, some former members have formed armed dissident groups that operate along the border

Venezuela-Guyana: claims all of the area west of the Essequibo River in Guyana, preventing any discussion of a maritime boundary; Guyana has expressed its intention to join Barbados in asserting claims before the UN Convention on the Law of the Sea that Trinidad and Tobago's maritime boundary with Venezuela extends into their waters; in 2018, Guyana initiated proceedings against Venezuela with the International Court of Justice (ICJ); Venezuela requested a direct dialogue to settle the dispute; the ICJ ruled that it had jurisdiction to hear the case in December 2020; in September 2021, Venezuelan officials issued a statement reasserting dominion over three-quarters of Guyana, which Guyana stated was a threat to its sovereignty and territorial integrity; in December 2023, the Venezuelan Government conducted a public referendum asking its citizens to support establishing a state in the disputed territory, granting citizenship to current and future area residents, and rejecting the jurisdiction of the ICJ

Venezuela-various:  Venezuela claims Aves Island and thereby an economic exclusion Zone/continental shelf extending over a large portion of the eastern Caribbean Sea; Venezuela’s claim to Aves Island is disputed by Dominica and several other countries because the island has rich guano deposits useful in producing fertilizer and gunpowder, as well as large fish stocks and natural gas reserves; contraband smuggling (narcotics and arms), illegal migration, trafficking in animals, plants, lumber, illegal exploitation of mineral resources