A lawyer for the Huawei executive facing extradition to the United States says there's evidence showing the case against her is "manifestly unreliable" and he wants that evidence admitted to the record.

Meng Wanzhou's lawyer Frank Addario says emails between staff at the telecom giant and international bank HSBC show the bank was well aware that Huawei controlled another company called Skycom, therefore Meng wasn't responsible for any violation of U.S. sanctions again Iran by the bank.

He told the B.C. Supreme Court hearing that staff at HSBC knew that Skycom was sold to Canicula, that Canicula was Skycom's parent company and that Huawei controlled the Canicula account.

Addario is asking the judge to admit affidavits including emails and bank account information into evidence to support the defence team's case at Meng's committal hearing, to be heard in May.

Meng was arrested at Vancouver's airport in 2018 on a request by U.S. officials who allege she misrepresented the relationship between Huawei and Skycom, causing HSBC to violate U.S. sanctions against Iran.

Both she and Huawei deny the allegations.