CRA notes that wire transfers can get lost because of intermediary banks cutting off essential characters

CRA observed that “intermediary banks often have a limit on the number of characters allowed in [a wire transfer] transaction, so this can result in some essential information being cut off” thereby resulting in difficulties allocating payments from non-residents and others to the correct account – and stated that “Currently, the best way to ensure that a wire transfer is successful is to also send a fax with the account information.”

Neal Armstrong. Summary of 8 March 2018 CBA Commodity Tax Roundtable, Q.13 under ETA s. 278(2).