Reference checks are a vital part of the employee selection process. The problem with doing references is they are often mechanical and predictable. So how do you make them valuable? Simply put, ask good questions to as many people as possible.
Here are 2 strategies to improve your odds.
Expand the Pool
Obviously candidates are not likely to give you the names of people who will say bad things about them. However, if you get the candidate to sign a release, you can expand the pool of people who you can talk to. Think, HR departments, past supervisors, co-workers and colleagues.
Now you may not get much out of them because they really only have to verify dates and pay rates but often times you can get more. If you approach it as a conversation between professionals, you can often soften them up.
Impact Questions
From the people you do get to talk to, make an impact by asking probing questions. For example, everyone asks how long have you worked with the candidate? How are they with other people? etc. What you really want to know is if this candidate made a difference.
Examples,
Can you tell me 1 or 2 of his/her major contributions to your company?
How did he/she impact the project/company?
Name 1 or 2 ways he/she saved money for the company?
How did he/she improve quality or improve a process?
Get the picture? These questions lead to answers on whether and how a candidate has made an impact. Ultimately that is what you want in an employee.
Final Word
A final word of caution, always document what you find and take everything as a whole. Checking a good job references involves talking with people and you never know the motivation behind what is being said. Take the information as a whole. If a pattern emerges there is probably something there. Especially if it is negative and would disqualify a candidate. Keep accurate good notes, it is good practice and may someday serve to keep you out of legal trouble.