Sometimes it happens that the amount sent from your bank and what we receive is different. This can happen due to intermediary, sending, receiving, or corresponding banks (banks between your bank and our bank account) charging fees or even exchanging the funds en route to a different currency because the destination country uses a different currency than the transaction currency.
To prevent this from happening, we highly recommend to inquire your bank to determine the best (and cheapest) route. You can also specifically ask your bank to include a message with the transaction that states any corresponding or intermediary bank should not exchange or convert into a different currency en route.
Kraken does not currently apply fees to CAD deposits. If you see fees were charged, you can ask your bank to trace the transaction and find out at which point conversions and fees. It is important to note that your bank may charge you to trace the funds. Any fees associated with CAD deposits are not Kraken's responsibility.