Sale of 29th tranche of electoral bonds begins The sale of the 29th tranche of electoral bonds started amidst Assembly elections in five States - Rajasthan, Madhya Pradesh, Chhattisgarh, Telangana and Mizoram. About Electoral Bond Scheme Launch - 2018 as an alternative to cash donations to political parties. Only bank authorised to issue and encash the bonds - State Bank of India Purchased anonymously by donors. Validity - 15 days from the date of issue. Denominations of Bond - Rs 1,000, Rs 10,000, Rs 1 lakh, Rs 10 lakh and Rs 1 crore. Available for purchase for a period of ten days each in the months of January, April, July and October Recently this provision has been amended to conduct extra fortnight sale when states or Union territories have elections.