IRS: Uncashed Payout Checks From Retirement Plans Are Still Taxable.
Do cashed checks get reported to IRS?
Cashed checks are traceable. ... When you cash a check greater than $2500, then the bank (depending on which one you use) is required to have you show your ID, and it will be a recorded transaction. Anything over $10,000 will be automatically sent to the IRS so they will have a record of this information.
What happens if I don't cash my 401k check?
If the bank returns it unpaid, it will probably charge a returned-item fee. In addition, your bank will reverse the amount credited to your account when you deposited the item. If your account falls into overdraft status as a result, you may incur an overdraft fee.