What is the reversal of burden?

Could you please elaborate on the concept of "reversal of burden" in the context of law or finance? Specifically, how does it differ from the standard principle of burden of proof, and in what scenarios might it be applied? Additionally, are there any particular regulations or precedents in the cryptocurrency and finance industries that have addressed this concept? Understanding the nuances of this term would be invaluable in navigating complex legal and financial disputes within these fields.