Data cleansing outsourcing refers to the practice of hiring a third-party service provider to clean and validate data in a company's database or system. This process involves identifying and removing incorrect, incomplete, or duplicate data, as well as ensuring that data is accurate, consistent, and up-to-date.

Outsourcing data cleansing can be a cost-effective way for businesses to improve the quality of their data without having to invest in additional resources or expertise. By outsourcing this task, companies can save time and money and focus on their core business activities.

However, it's important to choose a reputable outsourcing provider with a track record of delivering high-quality data cleansing services. Companies should also ensure that the provider they choose follows strict security protocols to protect sensitive data and that they comply with all relevant data privacy regulations.