Executive recruiters are working to make an accurate match between job seekers and employers. In order to do that, they must have accurate information about the people they are presenting. W-2 forms show a more complete picture of income than check stubs or tax returns. The W-2 is more complete than a check stub because it includes bonuses and extraneous taxable benefits (dues, car expenses, etc.). Tax returns are considered confidential and hold more information that in needed by a recruiter. When negotiating pay, all benefits and salary have to be considered. Holding back your W-2 tells your recruiter that you’re not being honest about your income level.