Denali posts ACH transactions in order of receipt and in accordance with the payment instructions designated in the ACH file record and may be posted throughout the day. Due to recent changes in the ACH network, electronic payments and withdrawals may post even faster than before, in some cases, on the same day that you authorized them. It is very important to ensure that you have sufficient funds available in your account before you issue a check, or make in-person, online, or telephone payments, to avoid incurring NSF, overdraft, or Bounce! Protection fees. Checks should never be issued, nor payments scheduled, if sufficient funds are not available to satisfy the payment.