"The bitcoin community still debates whether Segregated Witness will help the network’s scalability or will instead create more problems. As I have previously written, SegWit raises legal questions because it would enable full digital signature (witness) data to be dropped from the transaction data; this would undermine the ability of bitcoin digital signatures to also be used as electronic contract signatures (for example, for smart contracts). Another key legal issue is evidentiary authentication of blockchain transactions. Ideally, we are moving to a world where the bitcoin network can power smart contracts and be used for numerous types of data transactions. But in such a world, what happens if companies and consumers cannot easily authenticate and prove those transactions later when there are legal disputes? In this piece, I’ll examine the problem under evidence laws."

https://coingeek.com/the-risks-of-segregated-witness-problems-under-evidence-laws/