Needs enlightenment

Hello everyone. The husband just died a month ago and he was employed. The wife already called Fidelity, and they have submitted a form. The wife is not residing in the united states because the husband was just in the process of petitioning the wife when he died.  I wonder how long would it take for the wife to claim the benefits? 

Assuming the wife is the sole beneficiary wouldn't it be processed like any other death benefit of the plan through the Plan's administrative procedures? The issue than becomes one of withholding to a payee outside the US and what withholding rules may or may not apply.