According to AARP, this is a common scam that has cost grandparents millions of dollars. Unfortunately, the tax rules don’t help in any way. The deduction for a theft loss—assuming such scam is a theft under state law—cannot be claimed in 2018 through 2025.
A portion of earnings withheld by an employer or put into a retirement plan for distribution to the employee at a later date. If certain legal requirements are met, the deferred amount is not taxable until actually paid, for example, after retirement.