Can international bank transfers be used to top up a Vietnamese bank card, and why might they be returned?

Use caution when transferring money to an unfamiliar cardholder: avoid sending funds to unknown people and use official bank details or verified services instead.

An incoming transfer to a newly issued BIDV card may not arrive immediately. Check with the bank that activation is complete and that the card details can receive transfers.

After a local bank card was issued, transfers from an overseas bank no longer went through and were automatically returned to the sender. Make a small test transfer before relying on this method and ask the bank which top-up channels are supported.