The limits of EU mediation and the crossroads at which the Kosovo-Serbia dialogue finds itself

The Kosovo-Serbia dialogue is at a critical juncture. The uneven implementation of agreements, chronic stalemates in the negotiation process, and the prospect of US-led initiatives will test the EU's credibility.

For more than a decade, Kosovo has been urged to treat restraint as a strategy and patience as a virtue. However, the results of the EU-facilitated Kosovo-Serbia dialogue show a different reality. Kosovo remains outside key international organizations, has been subjected to political and financial sanctions, and is repeatedly asked to de-escalate the situation without seeing reciprocal steps from Serbia. With Brussels aiming to prepare a new high-level meeting between Kosovo and Serbia later this year, the main question for Kosovo is no longer whether dialogue is necessary, but whether the current format can bring results against the costs it carries. The uneven implementation of agreements, chronic stalemates in the negotiation process, and the prospect of US-led initiatives will test the EU’s credibility.

This is not an argument against dialogue. It is an argument for the credibility of the negotiation process. The main problem lies in the gradual erosion of the mechanism that was intended to make dialogue effective: the conditionality of EU membership - the mechanism that should make dialogue effective. Without equal treatment, credible implementation and predictable consequences, the dialogue process for the normalization of relations between Kosovo and Serbia has transformed from a path towards a solution into a system of managed delays. Over the years, while the number of agreements has increased, their implementation has stalled. The political risk from engaging in the dialogue process is unevenly absorbed by the parties and strategic ambiguity becomes a rational choice.

To understand why the process continues to stall, it is necessary to clarify what “normalization” means in practice and why its meaning differs between Kosovo, Serbia, and the European Union.

Three meanings of normalization and a structural inequality

For Kosovo, normalization has always meant mutual recognition and equal treatment in substance, not just in language. In practical terms, this means reciprocal obligations, a fair sequence of commitments, and symmetry in consequences. Kosovo has consistently implemented agreements that carried immediate political and domestic costs, often ahead of Serbia’s steps, in the belief that progress in the normalization process would lead to international integration and accelerate its path toward Euro-Atlantic structures. When these results are not achieved, the normalization process ceases to be a bridge to achieving those goals and becomes a waiting room.
For Serbia, the normalization process has served other purposes. It has been treated as a means of functional accommodation, not the achievement of a binding agreement that produces legal consequences. Serbia has been cooperative to the extent that it secures economic benefits from the EU and increased influence in the region, while what is defined as the “unresolved status issue of Kosovo” is indefinitely postponed. This approach has enabled Serbia to derive benefits from the process, while maintaining strategic ambiguity over Kosovo’s sovereignty.

For the European Union, however, the normalization process is neither symbolic nor optional. It is a legal and institutional condition embedded in the framework of the enlargement process.

Normalization in the EU's legal logic: closing the dialogue without the word "recognition"

From the EU perspective, the dialogue on the normalization of Kosovo-Serbia relations, in addition to the imperative of maintaining stability in the region, represents a structural obstacle to the enlargement process. For it, Kosovo’s independence exists in a legally hybrid space: recognized by the majority of EU member states, confirmed by the International Court of Justice that it has not violated international law, but contested by Serbia and five other EU states. This ambiguity can be managed politically in the short term, but in the long term it poses a legal and procedural challenge.

Normalization is designed to solve this challenge through three related effects. 
First, it aims to neutralize the issue of independence contested by its members. EU officials have often pointed out that, although international law does not contest Kosovo’s declaration of independence, stable statehood is consolidated through subsequent accession. Serbia’s recognition of Kosovo’s independence, whether declarative or de facto, would ensure this consolidation, turning Kosovo’s independence from a contested fact into a legal reality accepted by all EU member states.

Second, normalization enables internal coherence within the EU. The five member states that do not recognize Kosovo are constrained less by opposition to it than by concerns about legal precedents. A normalization agreement supported by Belgrade would allow these states to change their positions, recognizing Kosovo's independence without calling into question their constitutional framework and international positioning as supporters of the international system based on international law.

Third, normalization sets the legal condition for membership. The EU cannot integrate a state whose sovereignty is actively contested by another candidate state, nor can it advance Serbia’s membership while an unresolved territorial claim persists. For this reason, Brussels insists on a comprehensive and legally binding agreement, even as it avoids the language of formal recognition. The goal is clear: legal conclusion of the dialogue without rhetorical escalation.
However, this logic is entirely dependent on implementation.

When implementation fails: unequal consequences and distorted incentives

If normalization is a process that produces legal consequences, equal treatment of the parties is not optional - it is a fundamental prerequisite. The credibility of EU mediation has suffered most where this principle has been applied inconsistently.

The contrast between the EU’s response to Kosovo’s actions in the north and the response to the attack in Banjska illustrates this clearly. When Kosovo institutions inaugurated mayors after legitimate local elections in northern Kosovo in 2023, despite low voter turnout in those municipalities, the EU responded with immediate political and financial punitive measures against Kosovo, emphasizing the need for de-escalation. No similar measures were taken after the attack in Banjska that same year, which involved organized and armed groups from Serbia, a Kosovo policeman killed, and clear indications of Serbian involvement. 

The distinction is not a matter of interpretation, but of legal significance. One case concerned the exercise of municipal authority under Kosovo law. The other case concerned an armed attack challenging Kosovo’s territorial integrity by its northern neighbor. However, the implementation overturned this hierarchy. Kosovo was penalized. Serbia was not.

This asymmetry has shifted incentives across the region. By failing to impose punitive measures on Serbia after Banjska, the EU, perhaps unintentionally, signaled that instability could be absorbed, while legal but politically unpalatable actions would be sanctioned. Over time, this has weakened the EU’s conditioning and influencing power over the parties and reinforced the perception in Kosovo that its sovereignty is seen by the EU as conditional and incomplete.

From facilitated dialogue to restraint: how momentum for dialogue was lost

As the level of implementation of agreements reached during the normalization process declined, the process gradually shifted from facilitated dialogue to self-restraint. Agreements were reached, but not implemented. Monitoring mechanisms were introduced, without punitive measures for parties that did not implement the obligations arising from the agreements. Political crises were managed, but not resolved.

Cyclical political deadlocks and frequent elections in Kosovo and Serbia further hampered progress in the dialogue process. Each election cycle resets incentives, delays implementation, and subjects the dialogue process to local considerations and the respective positioning of political parties within the country. At the same time, both sides increasingly relied on faits accomplis to change the reality on the ground, calculating, often rightly, that the dialogue would then adjust.

For Kosovo, this created a paradox: the more it fulfilled its obligations from the dialogue process, the more restraint was expected from it; the less Serbia fulfilled its obligations, the more accommodation it had for its actions from the EU.

Why failure in 2026 would have strategic costs for the EU

The 2026 dialogue carries with it higher risks than in previous rounds. Europe is already facing unfavorable options for ending Russia’s war in Ukraine, which has exposed the limits of its strategic autonomy and its crisis management capabilities. At the same time, President Trump’s return to the White House in 2025 has accelerated the shift toward a more transactional international order, where norms are increasingly subordinated to interests and guarantees come with clear conditions.

In this context, the Western Balkans remain a weak point for Europe. An unresolved conflict between Kosovo and Serbia undermines the EU’s credibility, weakens its internal unity and strengthens doubts about the effectiveness of conditionality during the accession process. For Bosnia and Herzegovina, it could set a precedent that unresolved sovereignty can be managed indefinitely rather than resolved. For Montenegro and North Macedonia, it raises questions about expectations that implementing reforms will bring real progress in the EU accession process. For Serbia, it reinforces the belief that its strategic ambiguity and simultaneous pro-Brussels, Moscow and Beijing positioning are paying off.

Washington's eventual involvement: normalization through conditionality

Against this backdrop, the prospect of an independent, US-led initiative cannot be entirely ruled out. Hypothetically, such an effort would not aim to improve the current format of the EU-mediated dialogue process, but could replace its logic with a more transactional model, focused on quick and actionable results.
The precedents of such American engagement during the second Trump presidency can serve as a guide to what we can expect from such engagement. In the case of Ukraine, US engagement has increasingly tied aid to the fulfillment of specific conditionality, oversight mechanisms, and access to strategic resources critical to US and allied supply chains. In the Azerbaijan-Armenia deal, Washington has prioritized the reopening of transport corridors and economic integration, putting aside unresolved historical issues in favor of stability. The Abraham Accords normalized Israel’s relations with Arab states not by resolving core disputes but by exchanging symbolic gains for concrete economic, security, and technological cooperation, backed by US guarantees.
In the case of the Kosovo-Serbia dialogue, a US-led agreement would prioritize stability over legal symmetry. Referring to the Washington agreement, reached in September 2020 during the first Trump administration, and if the Kosovar side does not precede developments with preliminary discussions with the White House and does not conduct effective lobbying, Kosovo could again be asked to accept a temporary moratorium on applications for membership in international organizations - a concession that would delay the consolidation of statehood and test internal consensus in Kosovo. In return, Serbia would be asked to stop all forms of obstruction of Kosovo, accept Kosovo's authority over the entire territory, accept its de facto independence, and cease campaigns against recognitions of Kosovo by other countries.
The highly contested association of Serb-majority municipalities would be strictly limited and integrated within Kosovo's constitutional order and under rigorous international monitoring. Its goal would be functional municipal cooperation, not the creation of a tool for blackmailing Kosovo as a whole.

Enforcement would be the most defining element of such American engagement. Economic integration, infrastructure development, and access to strategic sectors would be accelerated, while violations would automatically trigger sanctions against the parties concerned. Enforcement would be mandatory through trilateral bodies, and therefore would not be optional.

Such an approach would not be without risks. US-brokered deals under the Trump presidency are typically concluded quickly, but are politically complex and sensitive to changes in the White House. Transactional guarantees may yield short-term results, but lack the sustainability offered by a dialogue linked to the EU accession process that is predictable and based on rules and benefits. For Kosovo, the trade-off could be clear: de facto recognition of the cost of postponing international consolidation for even a short period of time.

The way forward: EU or US

The path that lies before Kosovo is not a choice between Brussels and Washington. It is between returning to credible dialogue under the EU umbrella or accepting a quick deal imposed by Washington - born out of frustration at the failures so far with the EU approach.

For the EU, this means reaffirming the equal treatment of the parties, the symmetrical implementation of agreements and restoring credibility to the conditionality and rewards associated with a timely and clearly defined EU membership process. The first step in this direction would be to grant Kosovo the status of candidate country for EU membership. Without giving Kosovo an equal opportunity for EU membership on its merits, the dialogue process risks becoming a permanent exercise in conflict management rather than a path towards its resolution.
For Kosovo, the question is no longer whether continued restraint within a weakened process can produce positive results for it. Kosovo has the ability to set red lines, list the commitments it has made in the dialogue, and insist that non-implementation of agreements be accompanied by consequences for Serbia.

Dialogue without implementation of agreements is not diplomacy. It only produces delays. In the Western Balkans, delays have a long history that often turns into instability and destabilizing actions.

(Blerim Vela served as Chief of Staff to the President of Kosovo (2021-2023) and has a PhD in Contemporary European Studies, at the University of Sussex).