I think a more important issue is that of timeouts. Yet again I have had the misleading error message at a Microgaming casino to "try again later", but finding the funds have left my Neteller account.
While timeouts will happen, it should at least fail safe, and it is about time the error message was changed as it is highly misleading to suggest that the player simply "try again" without first checking with Neteller that the funds have not gone into limbo.
I have suggested this time that the merchant server for the casino send back a receipt to Neteller to confirm the funds have arrived in the casino account, and only on receipt of this would the funds be removed from the Neteller account. Currently, Neteller sends an "NT" code, and the success of sending this seems enough to have the funds removed from the account. It seems the timeout happened after this, leading to the code arriving, but not the funds, so the transfer to the casino did not happen.
While it can be sorted by quoting the offending NT code to the casino, this can be a pain, as first it is necessary to phone Neteller, and then phone the casino. Depending on standards, this could involve being "on hold" in two queues. I would far rather just try again later without the hassle.
I do not know in which waste paper basket this suggestion will be filed, and whether the filing will be by Neteller or Microgaming.