I got called down to the payroll office a few years ago regarding this exact same thing. The only way anybody is going to get any unemployment funds is if the company you used to work for doesn't catch this and just pays it. If they're paying any attention at all, the payroll department is where it dies. It's a good idea to keep an eye on your credit anyway, so I think you're ok. Your absolute last resort would be applying for a new social security number, because that sounds like a great big headache at retirement, or a way to get screwed out of benefits due to clerical error.