Not even just trading platforms but also major payment processors: https://help.venmo.com/hc/en-us/articles/235171088-Cancel-Payment https://help.venmo.com/hc/

Not even just trading platforms but also major payment processors: https://help.venmo.com/hc/en-us/articles/235171088-Cancel-Payment https://help.venmo.com/hc/en-us/articles/235171088-Cancel-Pa...