Where it does not happen, you are good, where it does, you should know what to do. It may not be just Hr & it may not be just money.
Here are the tips on how to know its happening & what to do about it.
visit
http://www.hospemagjobs.com/articles/secrets-of-recruitment/secrets-of-recruitment-5-recruiters-pay-human-resources/
or
http://bit.ly/cmYeNT