27. Are there provisions requiring donations to go through the banking system?
Serbia
"For the purpose of raising funds for election campaign financing a political entity shall open a separate account that may not be used for other purposes. A political entity not having the account specified in paragraph 1 of this Article is required to open such account after calling of elections and before registering own election list. All funds intended for financing of election campaign are paid into the account specified in paragraph 1 of this Article and all payments of election campaign costs are made from that account."
Source: Article 24, Law on financing political activities, 2014 consolidated text
For election campaigns