I paid this in the middle of the billing cycle as I needed to free up the credit line for another major purchase. What they told me was that "larger" payments can take longer. I do'nt agree with their logic for two reasons, first, it's the same process if it's a $12 payment of a $12K payment. Second, I have made half a dozen payments in this same manner for over $6K in the past year or two, and with Bank One it was always credited the next business day.
Chase, well, they just suck. I think they were trying to hold my money to "use it" for a few extra days. When I called, I told the manager that she could see my records and that I had put over $105K through that account last year, and was it really worth losing my business to make an extra buck in interest by holding my money for a week? I suggested that I was sure another institution might be happy to have my business, and it was only then that she agreed to check with my bank and if the payment had cleared my account she could manually put it though on their end.
I've had other issues as well with them since Chase took over, and I'm taking my business elsewhere.
Anne