There is no USCIS Chicago Service Center and it is just lockbox (mailbox). You need to find the Service Center from your I-131 Receipt Notice which sent you the receipt notice. Then, check the case processing time at this link:
There is no USCIS Chicago Service Center and it is just lockbox (mailbox). You need to find the Service Center from your I-131 Receipt Notice which sent you the receipt notice. Then, check the case processing time at this link: