It's really a business decision whether you permit the activity or not. It's not uncommon for immigrants to send an ATM card to family members back home as this method is likely less expensive than funds transfers via Western Union, Moneygram, Envios, etc. If it is not a joint account owner in possession if the card, you have the potential risks of providing services to an unknown individual which increases OFAC risk, fraud risk, etc.
Mary Beth Guard referred to these unknown persons as "Ghost customers" at a Top Gun presentation many moons ago.
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