Telstra has issued a warning to North Queensland residents to be cautious when responding to emails or phone calls from organisations asking for personal details, following reports of emails and phone call scams.

The perpetrators email or phone Telstra customers, purporting to be from Telstra, advising them they are eligible for a bill refund.

Telstra Country Wide Area general manager for North Queensland, Rachel Cliffe, said her office had received several reports from customers, who had been told they must provide information such as their driver's licence, passport details and home address to qualify for a refund.

"Telstra will never request this level of personal detail via email or over the phone, and any such request should be treated with caution," Cliffe said in a statement.

"It is disturbing to hear these reports and we're keen to ensure customers are careful not to share personal details unnecessarily."