Legal basis:

107 legal documents were signed between the Republic of Azerbaijan and the Republic of Bulgaria:

1. 5 June 1992 – signed in Oslo – Protocol on the establishment of the diplomatic relations between the Republic of Azerbaijan and the Republic of Bulgaria.                                                                                                                   
2. 29 June 1995 – signed in Sofia – Agreement between the Government of the Republic of Azerbaijan and the Government of the Republic of Bulgaria on trade-economic and scientific-technical cooperation.
3. 29 June 1995 – signed in Sofia – Contract on friendship and cooperation between the Republic of Azerbaijan and the Republic of Bulgaria.
4. 29 June 1995 – signed in Sofia – Agreement between the Government of the Republic of Azerbaijan and the Government of the Republic of Bulgaria on air transportation between and beyond their respective territories.
5. 29 June 1995 – signed in Sofia - Agreement between the Government of the Republic of Azerbaijan and the Government of the Republic of Bulgaria for international road transport of passengers and commodities
6. 29 June1995 – signed in Sofia – Contract between the Republic of Azerbaijan and the Republic of Bulgaria on legal assistance over civil issues.
7. 29 June1995 – signed in Sofia – Agreement between the Republic of Azerbaijan and the Republic of Bulgaria on legal assistance over criminal issues.
8. 29 June1995 – signed in Sofia – Agreement between the Republic of Azerbaijan and the Republic of Bulgaria on extradition.
9. 9 November1997 – signed in Baku – Protocol on cooperation between the Ministry of Foreign Affairs of the Republic of Azerbaijan and the Ministry of Foreign Affairs of the Republic of Bulgaria.
10. 2 December 1999 – signed in Baku – Joint Declaration of the President of the Republic of Azerbaijan and the President of the Republic of Bulgaria.
11. 2 December 1999 – signed in Baku – Agreement on cooperation between the State Statistical Committee of the Republic of Azerbaijan and the National Statistical Institute of the Republic of Bulgaria in the field of statistics.                                              
12. 2 December 1999 – signed in Baku – Agreement between the Government of the Republic of Azerbaijan and the Government of the Republic of Bulgaria on cooperation in the field of standardization, meteorology and certification.
13. 2 December 1999 – signed in Baku – Agreement between the Government of the Republic of Azerbaijan and the Government of the Republic of Bulgaria on mutual cooperation in custom matters.
14. 2 December 1999 – signed in Baku – Agreement between the Government of the Republic of Azerbaijan and the Government of the Republic of Bulgaria on cooperation in the field of tourism.
15. 31 October 2001 – signed in Shumen - Agreement of cooperation between the Baku Slavic University and the Konstantin Preslavsky University of Shumen. 
16. 25 September 2002 – signed in Sofia - Agreement on cooperation in the military field between the Ministry of Defense of the Republic of Azerbaijan and the Ministry of Defense of the Republic of Bulgaria.
17. 10 October 2002 – signed in Sofia - Agreement on cooperation between the Baku Slavic University and the Sofia University St. Kliment Ohridski.
18. 7 October 2004 – signed in Baku – Joint Communiqué of the President of the Republic of Azerbaijan Ilham Aliyev and the President of the Republic of Bulgaria Georgi Parvanov.
19. 7 October 2004 – signed in Baku – Agreement between the Government of the Republic of Azerbaijan and the Government of the Republic of Bulgaria on cooperation in the fields of public health and medicine.
20. 7 October 2004 – signed in Baku – Agreement between the Government of the Republic of Azerbaijan and the Government of the Republic of Bulgaria on trade navigation.
21. 7 October 2004 – signed in Baku – Agreement between the Government of the Republic of Azerbaijan and the Government of the Republic of Bulgaria on international combined transportation of commodities.
22. 7 October 2004 – signed in Baku – Agreement on cooperation between the Azerbaijani State Telegraph Agency (AzerTAc) and the Bulgarian News Agency (BTA).                                                                                                                                        
23. 7 October 2004, Joint Declaration on establishment of sister city relations between Shaki (Republic of Azerbaijan) and Gabrovo (Republic of Bulgaria).                                       
24. 23 September 2005 – signed in Sofia – Joint Declaration of the President of the Republic of Azerbaijan and the President of the Republic of Bulgaria.
25. 23 September 2005 – signed in Sofia – Agreement between the Government of the Republic of Azerbaijan and the Government of the Republic of Bulgaria on facilitation of the visa regime.
26. 23 September 2005 – signed in Sofia – Memorandum on cooperation between the Government of the Republic of Azerbaijan and the Government of the Republic of Bulgaria on European and Euro-Atlantic integration.
27. 23 September 2005 – signed in Sofia – Protocol of understanding between the State Customs Committee of the Republic of Azerbaijan and the National Customs Agency of the Republic of Bulgaria on enforcement of the customs cooperation, including relevant professional training and enhancement of the qualification of the professional staff.
28. 23 September 2005 – signed in Sofia – Protocol of further cooperation between the aviation authorities of the Republic of Azerbaijan and the Republic of Bulgaria.
29. 23 September 2005 – signed in Sofia – Memorandum of cooperation between the Azerbaijani Television and Radio Broadcasting Closed Joint - Stock Company (AzTV) and the Bulgarian National Television (BNT)
30. 19 September 2006 – signed in Baku – Agreement on cooperation in the field of youth policy and sports between the Ministry of Youth and Sports of the Republic of Azerbaijan and the State Agency of Youth and Sports of the Republic of Bulgaria.
31. 15 May 2007 – signed in Baku – Agreement on cooperation between the Ministry of Justice of the Republic of Azerbaijan and the Ministry of Justice of the Republic of Bulgaria.
32. 12 November 2007 – signed in Baku – Agreement on economic cooperation between the Government of the Republic of Azerbaijan and the Government of the Republic of Bulgaria.
33. 12 November 2007 – signed in Baku – Agreement between the Government of the Republic of Azerbaijan and the Government of the Republic of Bulgaria on cooperation in the field of antimonopoly policy and competition protection.
34. 12 November 2007 – signed in Baku – Agreement between the Government of the Republic of Azerbaijan and the Government of the Republic of Bulgaria on avoidance of double taxation with respect to taxes on income and property.
35. 18 April 2008 – signed in Sofia – Memorandum of understanding on consultations between the Ministry of Foreign Affairs of the Republic of Azerbaijan and the Ministry of Foreign Affairs of the Republic of Bulgaria.
36. 03 June 2009 – signed in Baku - Agreement on cooperation between the Baku Slavic University and the Bulgarian University of National and World Economy.
37. 13 November 2009 – signed in Sofia – Memorandum of understanding on cooperation in the field of energy between the Ministry of Industry and Energy of the Republic of Azerbaijan and the Ministry of Economy, Energy and Tourism of the Republic of Bulgaria.
38. 16 April 2010 – signed in Sofia - Agreement on cooperation between the Azerbaijani State University of Culture and Art and the Bulgarian National Academy of Art.
39. 16 April 2010 – signed in Sofia - Agreement for cooperation between the Azerbaijani State University of Culture and Art and the Bulgarian National Academy of Theatre and Film Arts.
40. 23 September 2010 – signed in Baku – Memorandum of cooperation between the State Committee on Property Issues of the Republic of Azerbaijan and the Privatization and Post-Privatization Control Agency of the Republic of Bulgaria.
41. 08 April 2011 – signed in Baku  –  Agreement between the Government of the Republic of Azerbaijan and the Government of the Republic of Bulgaria for cooperation in the field of culture.
42. 14 November 2011 - signed in Baku – Agreement between the Government of the Republic of Azerbaijan and the Government of the Republic of Bulgaria on mutual protection and exchange of classified information.
43. 14 November 2011 – signed in Baku – Agreement on cooperation between the Azerbaijani State Economic University and the Bulgarian University of National and World Economy.
44. 14 November 2011 – signed in Baku – Memorandum on cooperation between the Diplomatic Academy of the Ministry of Foreign Affairs of the Republic of Azerbaijan and the Diplomatic Institute of the Ministry of Foreign Affairs of the Republic of Bulgaria.
45. 14 November 2011 – signed in Baku – Memorandum of cooperation between the Ministry of Labour and Social Protection of Population of the Republic of Azerbaijan and the Ministry of Labour and Social Policy of the Republic of Bulgaria.
46. 29 November 2011 – signed in Baku – Agreement on cooperation between the Azerbaijani National Academy of Sciences and the Bulgarian Academy of Sciences.
47. 27 April 2012 – signed in Baku – Agreement between the Government of the Republic of Azerbaijan and the Government of the Republic of Bulgaria for cooperation in the fight against crime. 
48. 27 April 2012 – signed in Baku – Agreement between the Government of the Republic of Azerbaijan and the Government of the Republic of Bulgaria on cooperation in the field on emergency situations.
49. 26 April 2012 – signed in Baku – Memorandum of understanding between the State Oil Company of Azerbaijan Republic (SOCAR) and the Bulgarian Energy Holding in the field of natural gas and oil.
50. 26 April 2012 – signed in Baku – Memorandum of understanding between the Azerbaijan Export and Investment Promotion Foundation (AZPROMO) and the Bulgarian Chamber of Commerce and Industry.
51. 02 July 2012 – signed in Baku – Memorandum on cooperation between the Constitutional Court of the Republic of Azerbaijan and the Constitutional Court of the Republic of Bulgaria.
52. 18 September 2012 – signed in Sofia – Memorandum of understanding between the Azerbaijani Medical University and the Medical University of Sofia
53. 03 October 2012 – signed in Baku – Agreement on cooperation between the Baku State University and the Sofia University St. Kliment Ohridski.
54. 05 October 2012 – signed in Baku – Agreement between Public Radio Television Broadcasting Company (ITV) and Bulgarian National Television (BNT)
55. 05 October 2012 – signed in Baku – Agreement on cooperation between the Azerbaijani International News Agency “TREND” and the Bulgarian News Agency (BTA).
56. 12 November 2012 – signed in Baku - Protocol of cooperation in the field of jurisdiction between the Supreme Court of the Republic of Azerbaijan and the Supreme Court of Cassation of the Republic of Bulgaria.
57. 16 May 2013 – signed in Baku - Memorandum of Understanding between the Baku High Oil School and the Technical University of Sofia
58. 16 May 2013 – signed in Baku - Memorandum of Understanding between the Baku High Oil School and the Burgas University “Prof. Assen Zlatarov”.
59. 16 May 2013 – signed in Baku - Memorandum of Understanding between the Baku High Oil School and the Technical University of Gabrovo.
60. 24 May 2013 – signed in Sofia - Agreement on Creating the Azerbaijani Language and Culture Centre in the Sofia University St. Kliment Ohridski between the Baku Slavic University and the Sofia University St. Kliment Ohridski.
61. 20 February 2014 – signed  in Baku - Memorandum of understanding between the Government of the Republic of Azerbaijan and the Government of the Republic of Bulgaria on cooperation in the field of Environment Protection.
62. 20 February 2014 – signed  in Baku - Agreement on cooperation between  the Ministry of Finance of the Republic of Azerbaijan and the Ministry of  Finance of the Republic of Bulgaria. 
63. 20 February 2014 – signed  in Baku - Memorandum of understanding between the Baku State University  and the St.Cyril and St.Methodius University of Veliko Tarnovo.
64. 23 May 2014 - signed in Baku - Memorandum of Understanding on cooperation in the field of agriculture between the Ministry of Agriculture of the Republic of Azerbaijan and the Ministry of Agriculture and Food of the Republic of Bulgaria
65. 23 May 2014 - signed in Baku - Agreement on cooperation between the Azerbaijan State Agrarian University and the Agriculture University of Plovdiv.
66. 30 June 2014- signed in Baku - Cooperation Programme between the Chief Prosecutor’s office of the Republic of Azerbaijan and the Chief Prosecutor’s office of the Republic of Bulgaria 
67. 19 September 2014 – signed in Baku – Joint Declaration of the President of the Republic of Azerbaijan and the President of the Republic of Bulgaria
68. 20 September 2014 – signed in Baku - Memorandum of understanding between the State Oil Company of the Republic of Azerbaijan “SOCAR” and “Bulgartransgaz” on exploring the opportunities for cooperation in the project for development of the Chiren gas storage facility.
69. 20 September 2014 – signed in Baku – Protocol of intention between the  State Oil Company of the Republic of Azerbaijan “SOCAR” and “Bulgartransgaz”
70. 4 November 2014 - signed in Baku - Agreement on cooperation and information exchange between Trend information agency (Azerbaijan) and Focus information agency (Bulgaria)
71. 4 March 2015 – signed in Sofia – Joint Declaration on Strategic Partnership between the Republic of Azerbaijan and the Republic of Bulgaria.
72. 4 March 2015 – signed in Sofia – Agreement between the government of the Republic of Azerbaijan and the government of the Republic of Bulgaria on cooperation in the field of electronic communications, information technology and e-governance. 
73. 4 March 2015 – signed in Sofia – Protocol on the expansion of the cooperation in the field of tourism between the Ministry of Culture and Tourism of the Republic of Azerbaijan and the Ministry of Tourism of the Republic of Bulgaria.
74. 17 April 2015 – signed in Sofia – Memorandum of Understanding on mutual cooperation between Azerbaijan National Library named after M.F.Akhundov and St. St. Cyril and Methodius National Library of the Republic of Bulgaria.
75. 20 April 2015 – signed in Baku – Agreement on cooperation between Baku Higher Oil School and „Angel Kanchev“ University of Ruse.                                                              
76. 29 September 2016 – signed in Baku – Memorandum between Baku International Sea Trade Port and Port Infrastructure Company of Bulgaria.                                                                      
77. 29 September 2016 – signed in Baku – Memorandum of cooperation between Azerbaijan Export and Investment Promotion Foundation (AZPROMO) and Small and Medium Enterprises Promotion Agency of Bulgaria.                                                                    
78. 29 September 2016 – signed in Baku – Memorandum of cooperation between Azerbaijan Chamber of Trade and Industry and Chamber of Trade and Industry of Sofia.                                                                                                                                                  
79. 29 September 2016 – signed in Baku – Memorandum of cooperation between Azerbaijan Chamber of Trade and Industry and Small and Medium Enterprises Promotion Agency of Bulgaria.                                                                                                                                                                    
80. 29 September 2016 – signed in Baku – Memorandum of cooperation between Azerbaijan Export and Investment Promotion Foundation (AZPROMO) and Bulgaria-Azerbaijan Chamber of Trade-Industry.       
81. 11 October 2016 – signed in Baku – Agreement on cooperation between the APA Information Agency of Azerbaijan and FOCUS News Agency of Bulgaria.                           
82. 10 April 2017 – signed in Sofia – Agreement on cooperation in the field of science and technology between the Azerbaijani National Academy of Sciences and the Bulgarian Academy of Sciences. With this agreement between the two institutions previous agreement dated 29 November 2011 has been expired.                                            
83. 18 July 2017 – signed in Sofia – Memorandum of Understanding between the State Oil Company of the Republic of Azerbaijan “SOCAR” and “Bulgartransgaz”. 
84. 21 May 2018 – signed in Sofia – Memorandum of Understanding between Literature Institute named after Nizami Ganjavi of the Azerbaijani National Academy of Sciences and Literature Institute of the Bulgarian Academy of Sciences.                                                                                
85. 21 May 2018 – signed in Sofia – Agreement of cooperation between Archeology and Ethnography Institute of the Azerbaijani National Academy of Sciences and National Archeology Institute and Museum of the Bulgarian Academy of Sciences.                 
86. 26 June 2018 – signed in Burgas – Agreement on establishment of friendship and partnership relations between the Sumgayit city of the Republic of Azerbaijan and the Burgas city of the Republic of Bulgaria.                                                                                     
87. 24 September 2018 – signed in Baku – Memorandum of Understanding between the University of Mining and Geology named after St. Ivan Rilski of Bulgaria and Baku State University.                                                                                                                    
88. 5 October 2018 – signed in Sofia – Agreement on Academic Cooperation and Exchange between the Azerbaijan State Academy of Physical Culture and Sports and the National Sports Academy named after Vasil Levski.                                                
89. 31 October 2018 – signed in Sofia – Memorandum of Understanding on cooperation in the field of education between the Ministry of Education of the Republic of Azerbaijan and the Ministry of Education and Science of the Republic of Bulgaria.                                                                            
90. 7 November 2018 – signed in Sofia – Agreement between the Center for Agrarian Science and Innovation under the Ministry of Agriculture of the Republic of Azerbaijan and the Academy of Agriculture of the Republic of Bulgaria on scientific and technical cooperation.                                      
91. 7 November 2018 – signed in Sofia – Memorandum of Understanding between Sumgayit Chemical Industrial Park LLC and Bulgarian National Industrial Zones Company.
92. 7 November 2018 – signed in Sofia – Memorandum of Understanding between Azerbaijan University of Tourism and Management and Bulgarian International Business School.                                                                                                                                                           
93. Memorandum of Understanding between the National History Museum of Azerbaijan and the National History Museum of Bulgaria (2019).                      
94. 18 April 2019 – signed in Veliko Tarnovo – Partnership Agreement on cooperation in fields of culture, tourism, city-building, education, science and economy between the Nakhchivan city of the Nakhchivan Autonomous Republic of the Republic of Azerbaijan and Veliko Tarnovo city of the Republic of Bulgaria.                                                       
95. 17 April 2019 – signed in Sofia – Agreement on cooperation between Baku Slavic University and Veliko Tarnovo University named after St. Cyril and Methodius.               
96. 4 June 2019 – signed in Ganja – Agreement on cooperation between Azerbaijan State Agrarian University and Plovdiv Agrarian University (2014) has been renewed.                                                                                                                                                                                        
97. 4 July 2019 – signed in Baku – Program on cultural cooperation between the Ministry of Culture of the Republic of Azerbaijan and the Ministry of Culture of the Republic of Bulgaria for 2019-2023.                                                                                                                               
98. 6 November 2019 – signed in Baku – Agreement between the Government of the Republic of Azerbaijan and the Government of the Republic of Bulgaria on Pension Provision.                                                                                                                                                                                  
99. 21 November 2019 – signed in Baku – Protocol amending the Agreement between the Government of the Republic of Azerbaijan and the Government of the Republic of Bulgaria on cooperation in combating crime.                                                                                          
100. 21 November 2019 – signed in Baku – Agreement between the State Border Service of the Republic of Azerbaijan and the Ministry of Internal Affairs of the Republic of Bulgaria on cooperation in the field of border issues.
101. 11 March 2021 – signed in Sofia – and 19 May 2021 – signed in Baku – "Agreement on cooperation in the field of military education and training between the Ministry of Defense of the Republic of Azerbaijan and the Ministry of Defense of the Republic of Bulgaria". 
102.  30 September 2022 – signed in Sofia – "Memorandum of Understanding between the city of Shusha of the Republic of Azerbaijan and the city of Veliko Tarnovo of the Republic of Bulgaria on the establishment of fraternal relations and cooperation in culture, tourism, urban planning, science, economy and other relevant fields of public life". 
103. 12 December 2023 – signed in Baku – "Memorandum of Agreement between the Ministry of Youth and Sports of the Republic of Azerbaijan and the Ministry of Youth and Sports of the Republic of Bulgaria on cooperation in the field of youth and sports".
104. 8 May 2024 – signed in Baku – “Joint Declaration on Strengthening the Strategic Partnership between the Republic of Azerbaijan and the Republic of Bulgaria”.
105. 8 May 2024 – signed in Baku – “Code Share Agreement between Azerbaijan Airlines CJSC and Bulgaria Air JSC”.
106. 8 May 2024 – signed in Baku – “Memorandum of Understanding between the Ministry of Digital Development and Transport of the Republic of Azerbaijan and the Ministry of Innovation and Growth of the Republic of Bulgaria on cooperation in the field of technological innovation”.
107. 8 May 2024 – signed in Baku – “Memorandum of Understanding between State Oil Company of Azerbaijan Republic and Asarel Investment EAD”.
108. “Joint Development Agreement between SOCAR and Asarel Energy” (Baku, November 13, 2024)
109. “Agreement between the Government of the Republic of Bulgaria and the Municipality of Veliko Tarnovo, on the one hand, and the Government of the Republic of Azerbaijan, on the other hand, on cooperation for the construction and renovation of ‘Shusha Park’ in the city of Veliko Tarnovo, Republic of Bulgaria” (Sofia, 11 February 2026)