The founder and chief executive of fallen ASX tech darling iSignthis John Karantzis has welcomed the opportunity to address any regulatory concerns in the company after its shares were suspended from trading indefinitely.

The suspension comes amid ongoing inquiries from both the Australian Securities Exchange (ASX) and the Australian Securities and Investments Commission (ASIC) into the company.

iSignthis MD John Karantzis was one of the beneficiaries of the massive performance rights issue.

The ASX ordered the company into a suspension from trading on Thursday morning "with immediate effect" under Listing Rule 17.3 - where the suspension is not at the company's request.

The securities regulator said the decision was made in consultation with ASIC pending the outcome of inquiries to be made by the two regulators "into a number of issues concerning [the company]".