When you ask for a reference, both whom and how you ask for a job reference is really important. You need to be sure that the person who is recommending you for employment is willing and able to give you a good reference. This is critical because your references can be what makes the difference in getting – or not getting – a job offer.

In addition, you shouldn’t give out anyone’s name as a reference without their permission. The individual who is giving you a reference needs to know ahead of time that they may be contacted regarding a reference for you.

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https://www.worldjobtrends.com/how-to-ask-for-a-reference-for-a-job/