Giant telecommunication firm Telstra Corporation called the attention of its shareholders on Thursday, warning them of two unsolicited share offers pushed forward by National Capital Corporation Pty Ltd, which was previously punished in 2008 by corporate regulators.

Headed by 22 year-old Ben Hirvi of Queensland, Telstra said that the newly-formed capital outfit currently stands on 100 shares which were issued at $1 per share, with Mr Hirvi acting as the only shareholder of the investing firm.

National Capital Corp has submitted two unsolicited offers to buy Telstra shares with different price offers of $1.33 and $3.01 per share, the former only managing to match half of the telecommunication firm's current share price value of $2.64.

According to its released statement, Telstra cautioned its more than a million shareholders that the second offer of Mr Hirvi appeared only sugar-coated as the proposal came with the terms of 10 percent payment within 14 days of the offer's acceptance.

Telstra said that shareholders succumbing to such deceptive offer would have to wait for another 26 weeks to receive the remaining 90 percent of the full payment as the telco firm urged its investors to be vigilant to avoid any unnecessary problems.

Telstra corporate secretary Carmel Mulhern said on Thursday night that she already called the attention of the Australian Securities and Investments Commission (ASIC) to look into the suspicious offers.

Ms Mulhern also made clear to Telstra shareholders that the unsolicited offers "have no association with Telstra and any shareholder who receives an offer should not accept it without seeking independent financial advice on it and all of its terms."