An email has surfaced showing National Australia Bank is still engaging in a pressured sales culture, pushing staff to write new business, despite telling the royal commission this week it was "corrupting" customer outcomes.

Key points: NAB executive offers rewards for best Customer Fury stories and fastest increase in home loan sales

NAB executive offers rewards for best Customer Fury stories and fastest increase in home loan sales Email implores staff to "fill our funnel" of home loan sales before Christmas

Email implores staff to "fill our funnel" of home loan sales before Christmas No mention made of customer outcomes and need to lend responsibly

The email from a NAB executive pushes staff to "knuckle down" and achieve more mortgage applications before, "the Xmas lull to fill our funnel".

"You are our biggest introducers," the email states, "We need your help right now."

"By Friday this week … Can you email myself with your best Home Loan Customer Fury story and how many Home Loan referrals you have had."

The email offers a reward of 2,500 NAB recognise points for the best story.

It is not clear what the Home Loan Customer Fury comment refers to.

"Our pipeline is low, team," the email said.

"We need your help right now."

Fastest sales rewarded

An additional reward is offered for the staff member with the fastest increase in sales, with a minimum of five new applications in a week.

"The Banker that can land 5 [applications] first this week with 1 [refinance] application included in that will earn 2,500 NAB recognise points," was promised.

NAB told the royal commission the NAB Recognise program aimed to "align customer, community, company and shareholder interests and incorporate the key principles of the enterprise values and Consequence Management Framework".

It rewards staff with points that can be redeemed through online stores for items such as movie tickets and home appliances.

NAB email to staff urges a boost in home loan sales before Christmas ( Supplied )

In the part of the email the ABC has seen, there was no mention of customer outcomes, or any duty by the introducers or bankers to ensure they were lending appropriately.

'Not aligned with NAB values'

NAB executive general manger of retail banking, Krissie Jones said she was, "Disappointed with some of the language used in the email and how it might be interpreted."

"These comments are not aligned with NAB's values," Ms Jones said in a statement to the ABC.

"Over recent years, we have made significant changes to shift our culture from one that is sales driven to one that is focussed on meeting the needs of our customers.

"We know we have more to do, and I will use this example to remind our bankers that our focus must always be on customer outcomes."

Charges likely over NAB lending practices

In March, NAB's head of broker services, Anthony Waldron, admitted to the commission the bank breached responsible-lending laws through its Introducer Program.

The Introducer Program saw business people, including a gym owner and a tailor, refer customers to the bank for loans in return for commissions.

It has also left the bank open to the possibility of both criminal and civil charges being laid over its operation.

National Australia Bank chief executive Andrew Thorburn has since told the royal commission the Introducer Program had "put the bait right there for people" and that NAB needed to "keep our finger on it".

Bank staff have complained via the Finance Sector Union that despite the rhetoric from bank bosses at the royal commission that the pushy sales culture will be a thing of the past, workers say it is still alive and well.