I don't know if this should go here, but here goes.

Today, my father received a phone call from an anonymous number. he answered and they said that they were a center for credit card fraud, and that someone had opened a credit card with Bangkok Bank and had accumulated some debt that needed to be taken care of. He hasn't used Bangkok Bank in years.

Gullibly, he gave out his ID number, cell phone number, date of birth, and he told him that he had an account with a certain bank at a certain branch with credit cards from two banks.

Realizing what he did, he went and drained his account at an ATM and went to Bangkok Bank, who told him that this is an ongoing scam and they claim to be, among other things, the DSI.

They said not to worry about any credit fraud, and that anything odd will be taken care of by mail and not through the phone.

That said, should he worry about the information he gave out?

Yes.