Operation Branchform was a Police Scotland investigation into possible fundraising fraud in the Scottish National Party (SNP) that was launched in July 2021 and concluded in March 2025. The investigation concerned allegations that £666,953 raised by the SNP since 2017 specifically to campaign for independence in a proposed second Scottish independence referendum was in part improperly spent on other activities. The investigation has expanded to cover allegations of embezzlement, signature forgery, and misreporting of loans made to the party to the Electoral Commission.