What is the ruling on money or salaries received by an employee from two entities (National Service and a ministry) while working in one place?

If a person donates blood while fasting, then if he did so by his own choice and not out of necessity, his fast is broken and he must make up the day. If he did so out of a necessity that permits breaking the fast, there is no sin upon him, but he must make up the day. However, if blood was taken from him involuntarily, his fast is valid, and he does not have to make up the day.