Is it legal for a prospective employer to verify your current salary?

I am applying for several jobs in which I have been asked what I my current salary is. Is this legal??? If I am honest, then how am I ever going to get a job that pays more than what I currently make. If I lie and they find out, I have lost the job before it has even been offered to me. Does anyone have any... show more I am applying for several jobs in which I have been asked what I my current salary is. Is this legal??? If I am honest, then how am I ever going to get a job that pays more than what I currently make. If I lie and they find out, I have lost the job before it has even been offered to me. Does anyone have any thoughts / suggestions?

Thanks!
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