Prudential's chief financial officer James Turner resigned on 31 May "in light of an investigation into a Code of Conduct issue relating to a recent recruitment situation", the global insurer and international financial services group said in a statement.
Prudential said: "The Group sets itself high standards and Mr Turner fell short on this occasion. Mr Turner will remain available to the Group for a period of four months to support a smooth transition.
"There are no implications for the financial performance, reporting or operations of the business."
It further announced the appointment, subject to regulatory approval, of Ben Bulmer as chief financial officer.
Bulmer is currently CFO, insurance and asset management, having previously served as chief financial officer of Prudential Corporation Asia.
He has extensive experience of the Group, having served in a variety of leadership positions across the finance function in Asia and London since joining in 1997.
Bulmer becomes a member of the Group Executive Committee, reporting to Anil Wadhwani, chief executive officer, and will continue to be based in Hong Kong.
Wadhwani, chief executive officer said: "I am delighted to appoint Ben as Chief Financial Officer. Ben is a highly experienced finance leader who has developed a deep understanding of our business and markets during his 26 years at Prudential, including in his role as Chief Financial Officer at Prudential Hong Kong's Life Insurance businesses and in central finance roles in the Group. The Board and I have a strong relationship with Ben and look forward to continuing to work closely with him in his new role as we seek to take advantage of the significant opportunities ahead.
"Our Code of Conduct sets out that we expect all our colleagues to adhere to the highest professional standards and behaviours. On behalf of the Board, I would like to extend our gratitude to James for his twelve years of contribution to the business and wish him well for the future."
The Group further said it expected to publish its Half Year Results on 30 August, as previously announced.