Many lenders will consider unregistered income sources, such as freelance work, odd jobs, and other non-traditional income sources. It can be challenging to prove unregistered income, which is why lenders may require additional documentation such as bank statements, contracts, and tax returns to verify your income. This can be a problem if you donu2019t have access to the required documentation because it means that youu2019ll need to find another way to prove your income. If this is the case for you, then it may be better to focus on registered income sources like a salary or a pension benefit.