SC : (SBI submission recorded) Thus the details of the purchasers of the bond are not available centrally; (d)donor details and recipient details are available in separate silos; (e) details of the purchasers were kept in a sealed cover, which were deposited in the main branch of SBI Mumbai. The information of redemption of electoral bonds were stored in a sealed cover and were sent to SBI Mumbai branch. Matching of the information in the two silos is time-consuming process. Matching of the information on the purchase and redemption of bonds would be time consuming since donor information and redemption information is maintained in two distinct silos independent of each other. There is a large number of data sets to decipher. A total of 22,217 bonds were purchased between the period. This would add up to 44, 434 data sets since there are two silos of information.