The CU*BASE A2A toolkit does not use micro deposits. Your credit union must configure the third-party FI information in CU*BASE prior to the member having access to initiate A2A transactions, so you are responsible for performing the appropriate validations on the ownership of the account prior to any transfers being initiated.
Since we do not use micro deposits, this rule change does not apply to the A2A Transfers feature available via CU*BASE and our online/mobile banking products.