If a debt is collected, is zakah due on it for one year or for all the years that have passed?

Question:
We say: Honorable Shaykh, may Allah grant you success, a person has a debt owed to him by a delinquent debtor, or by a poor person who is unable to pay, and then he collects it. Does he pay zakah on it for one year, or for all the years that have passed? The school of thought holds that he pays zakah for all the years that have passed, but the ruling issued is that he pays zakah for one year only.

Answer:
That is the year in which he collected it, because that is the year in which he was able to take possession of his wealth. So he pays zakah on it for the year of collection only. This is the correct view.