so, since qbms doesnt get a response from amex whether the cvv is turned on or not, we will never know if the cvv passes?

so if you turn it on at amex, will qbms just figure the charge went through because it doesnt get a response that the cvv failed?

if thats the case i think i would rather just leave it to off for checking the cvv, because if it doesnt get a respone saying yes it worked or no it didnt, it must just default to it passed? which would be bad to figure out the charge really didnt go through because qbms wasnt told the cvv failed.