A, B, D, page, 634. See below. An error is not one of the following: a. The reversal of a direct deposit made in error is not considered an unauthorized EFT if the deposit was made to the wrong customer’s account, a duplicate was made to the customer’s account, or a credit was made in the wrong amount b. A routine inquiry about an account balance c. A request for duplicate copies of statements d. A request for information for tax or recordkeeping purposes e. The failure to receive a receipt from an electronic terminal when the transaction amount is $15 or less

An error in an Electronic Funds Transfer (EFT) typically doesn't occur when there's a request for duplicate copies of statements. This is considered a routine inquiry rather than an error in the EFT process. Options A, C, and D describe situations that might involve errors in EFTs: Option A discusses situations involving incorrect or duplicate direct deposits, which could indeed be considered errors. Option C addresses a failure to receive a receipt for a transaction, which could be an error depending on the circumstances. Option D mentions a returning request for information for tax or recordkeeping purposes, which could also involve an error in the EFT process.