Organic Law 8/2007 about funding of political parties (Spain):
Article 5. Limits on private donations.
Political parties may not accept or receive directly or indirectly:
a) Anonymous, finalist or revocable donations.
b) Donations from the same person exceeding 50,000 euros annually.
c) Donations from legal persons and entities without legal personality.
Donations in kind of real estate are exempt from the limit provided for in letter b), provided that the requirements established in article 4.2, letter e) are met.
All donations exceeding 25,000 euros, and in any case, donations of real estate, must be notified to the Court of Auditors by the political party within three months of their acceptance.
Article 7. Contributions from foreign people.
Political parties may receive non-final donations from foreign individuals, with the limits, requirements and conditions established in this law for private contributions, and provided that the requirements of current regulations on exchange control and capital movement are also met.
Parties may not accept any form of financing from foreign governments and organizations, entities or public companies or from companies directly or indirectly related to them.