13. Is there a ban on donations from any other source?
Estonia
A donation that does not comply with the terms and conditions laid down in subsection (1) of this section is prohibited. Above all, the following is prohibited: […]
3) the transfer or the granting of use of goods, services or proprietary rights to a political party on conditions not available to other persons;
4) release from ordinary binding duties or obligations;
5) waiver of claims against a political party;
6) payment of the expenses of a political party by third parties for the political party or making concessions to the political party, unless the payment of such expenses or the making of such concessions is also available to other persons in ordinary economic activities;
7) donation made via a natural person and at the expense of the assets of a third party; […]
Source: § 12.3(2), Political Parties Act, 1994 (amended 2014)
Other: Third parties