The "posted" day (night) is when your payment will be shown on-line for a transaction in the account activity and placed on your account balance. The case study describes the problem that Amazon was compelled to encounter head-on when news broke in 2015 in the NY Occasions write-up criticizing Amazon https://shanetrvmj.anchor-blog.com/16777634/an-unbiased-view-of-harvard-case-study-writing-help