13. Is there a ban on donations from any other source?

[…]

17.2.5. persons under the age of maturity;
17.2.6. individuals who fail to indicate their last names, first names, patronymic, series and numbers of Identity Card or those of a substituting document;
17.2.7. military units;
17.2.8. public associations and foundations, religious entities; […]

Source: Article 17§2, Law on Political Parties, 1992 (as amended in 2012).

90.2. The following shall be prohibited from rendering voluntary donations and assistance in kind or services to election funds of candidates, registered candidates, political parties, blocs of political parties, and referendum campaign groups: [...]
90.2.3. Stateless persons;
90.2.4. Citizens under the age of 18; [...]
90.2.6. International organizations and international social movements;
90.2.7. State bodies and municipalities;
90.2.8. State and municipal organizations and offices;
[...]
90.2.10. Military units;
Source: Article 90.2, Election Code of the Republic of
Azerbaijan, 2018

Law on Political Parties and Election Code list additional sources of donations which are prohibited.