Roest said he told his co-accused about it in morning meetings, while Petricevic denied this ever happened.
Petricevic's lawyer Charles Cato labelled Roest as a central figure at Bridgecorp who had a more "hands-on" position than his client, who was an "entrepreneur" tasked with growing the business. But Roest's counsel Rowan Butler said his client was the "most junior of all the directors" and had been in the role less than a year when payment issues emerged.
Roest had "nothing to gain from silence" and would have informed Petricevic - whose office was right next door - about the payment problems, Butler said.
Steigrad's lawyer Brian Keene, QC, said the non-executive director knew nothing about the missed payments and "faced almost institutional silence about this at board meetings".
The trial finished last month and Justice Geoffrey Venning has indicated he will give his verdict on Thursday.
Former Bridgecorp director Gary Urwin was due to be sentenced this week but this has now been adjourned until later in April.
Urwin originally pleaded not guilty and appeared in court with Petricevic, Roest and Steigrad but changed his plea in November last year.
Urwin's lawyer David Reece asked in November for a home detention report to be prepared, but prosecutor Brian Dickey said the Crown would seek a term of imprisonment.
The charges carry a maximum penalty of five years' jail or a fine of up to $300,000.
Former Bridgecorp chairman Bruce Davidson was sentenced to nine months' home detention in October after changing his plea to guilty, and was ordered to pay $500,000 reparations and perform 200 hours of community work.