H1B receipt notice not received

[txgun]

Hello

Filed for H1B extension in premium and we have only few weeks left in the current I-94 .  If I dont receive receipt notice , what is the proof that we filed before the expiry date?? What happens if we dont receive the receipt notice before the I-94 expiry date?? 

 

Thanks.

[vsmj]

Did you receive the Receipt notice