Allegations of electoral misconduct, irregularities throughout the campaign and state coercion of "No" supporters were widespread prior to, during and after the referendum. European election monitors said the referendum did not meet international standards.
State suppression of "No" voters The
AKP government and the
General Directorate of Security (police) have both been criticized for employing tactics designed to limit the campaigning abilities of "No" supporters, through arrests, control of the media and political suppression. On 23 January 2017, university students campaigning for a "No" vote on a commuter ferry in
Istanbul were implicated by security officers for 'insulting the president', with their arrests being stopped by onboard passengers. On 31 January,
Republican People's Party council member Sera Kadıgil was arrested and later freed on charges of 'insulting religious values and inciting hatred' for campaigning for a "No" vote on social media. In
Bursa, a voter who revealed that he was voting "No" was reported to the police and later arrested. National television channels have been vastly in favour of the "Yes" campaign. One study found that "Yes" supporters received 90% of airtime. Municipalities held by pro-"Yes" parties have also sought to limit the campaign events of "No" voters by denying them rights to hold rallies in public spaces of community halls.
Meral Akşener, a leading nationalist politician and one of the most prominent campaigners for a "No" vote, was stopped from holding speeches when her campaign venues in
Yalova and
Edirne were abruptly shut down shortly before her events, with posters advertising her events in
Eskişehir being ripped down. On 11 February while she was making a speech at a hotel hall in
Çanakkale, the venue suffered a power cut and was perceived by the pro-opposition media to be a symbol of the oppressive tactics against the "No" campaign. After initially being obstructed by riot police, attendees at the conference used their phone lights to allow the event to continue.
Overseas "Yes" campaign bans Overseas election campaigning, even in diplomatic missions, is illegal under
Turkish law. Yet, most political parties in Turkey, including CHP and the ruling AKP, have broken the law.
Germany In Germany, local municipalities withdrew permits for Justice Minister
Bekir Bozdağ's campaign event in
Gaggenau and Economy Minister
Nihat Zeybekçi's event in
Cologne. While authorities cited security concerns, the insufficient capacities of the rented venues and irregularities in the organisational process, the Turkish government strongly condemned the cancellations and claimed that they were directly linked to an anti-Turkish agenda of the German federal government. Turkish foreign minister
Mevlüt Çavuşoğlu claimed that Germany had shown 'double standards' and a disregard for 'human rights and freedom of speech' by cancelling the events. Following a negative reaction by the German federal government to a proposed rally by
Recep Tayyip Erdoğan, Erdoğan accused Germany of '
Nazi-style tactics', causing strong condemnation by German officials and a souring of diplomatic relations. The Turkish government also accused Germany of funding and supporting the
Kurdistan Workers Party (PKK), which is designated as a terrorist organisation in both countries.
Mevlüt Çavuşoğlu was due to meet his German counterpart on 8 March, with scheduled campaign speeches in
Hamburg also being cancelled due to irregularities with the venues. Çavuşoğlu therefore made his speech in the Hamburg consulate, despite Turkish law forbidding election campaigns in diplomatic missions. The cancellations in Germany were met by condemnation from the main opposition and pro-"No" Republican People's Party, with former leader
Deniz Baykal cancelling a planned visit to Germany as a result.
Diplomatic crisis with the Netherlands A diplomatic crisis occurred between
Turkey and the Netherlands on 11 March, after Çavuşoğlu's official plane had its permission to land revoked mid-air ahead of a scheduled campaign speech. Later that day, Families and Social Policy Minister
Fatma Betül Sayan Kaya's convoy was stopped by
Dutch police, which blocked her access to the Turkish consulate in
Rotterdam. Kaya was later declared
persona non grata, with a regional
state of emergency being declared and her convoy being asked to leave the country. Kaya was therefore forced to return to
Germany, while Çavuşoğlu left for
France to attend another campaign event. Violent protests by Turkish expats broke out in Rotterdam following the expulsion of both ministers, with the police making 12 arrests. The Dutch government had previously asked Turkish ministers to refrain from campaigning in the country, fearing that divisive campaign rhetoric would sow divisions within the Turkish community. Prime Minister
Mark Rutte claimed that negotiations with the Turkish government to allow a small scale speech by the minister were still ongoing, when Çavuşoğlu publicly threatened with sanctions should ministers be prevented from campaigning. It was these threats that made the situation unsolvable to the Dutch government. Many people in Turkey took the side of the Turkish government in the matter, with the pro-"No" main opposition announcing their support for the government and calling on the AKP to freeze diplomatic relations with the Netherlands. All CHP overseas campaign events were later suspended in solidarity, while the pro-"No" MHP dissident camp also expressed their condemnation against the Dutch government for their actions. In the Dutch parliament all parties, except for the two-seat
Denk party, supported the decisions of the Dutch Government.
Recep Tayyip Erdoğan reiterated his claim that European governments that suspended campaigning were 'Nazi remnants', which the Dutch government denounced as "unacceptable".
Unstamped ballots On the referendum day, while the voting was underway, the
Supreme Electoral Council of Turkey lifted a rule that required each ballot to have an official stamp. Instead, it ruled that ballots with no stamp would be considered valid, unless there was proof that they were fraudulent. Some claim that because ballots had not only stamps but other security measures in place, it doesn't make them illegitimate, but no proof whatsoever had been presented for this. The
Supreme Electoral Council filed a criminal complaint for the officials that caused the problem by not stamping the ballots. The opposition parties claim that as many as 2.5 million ballots without a stamp were accepted. Opposition parties
CHP and
HDP have said they will contest the results. CHP leader Kemal Kılıçdaroğlu said that lifting the rule violated Turkish law. The Peoples' Democratic Party contested the election results announced by pro-government
Anadolu Agency and insisted that 2.5 million votes without valid stamps should be cancelled. ==Opinion polls==