I have been named executor of my uncle's estate: What do I need to do?

Farming legal advice - The duties expected of an executor

Examples of executor’s duties include arranging for all of the deceased’s assets to be valued at the date of death.

Dear Stephen, 

My uncle who owns a farm died recently and one of my cousins is due to inherit the majority of his estate. I was appointed executor of his estate as I work in finance and my uncle would have thought I would be suitable to act. It was mentioned to me when he was making a will in passing and I gave it little thought. I know very little about my uncle’s affairs and really only ever saw him at family occasions. He is my father’s brother but my father passed away a number of years ago. Do I have to act as an executor and what would my duties be and is there a situation where I can be removed?