Letter from US Government

While we were expecting to get our I171H from the government, we ended up getting a letter last week stating that we had not supplied 2 documents (one for each of us) regarding our child abuse registry checks by our social worker. She had performed the checks and stated so in the home study but failed to send us a copy of the documents to pass on to USCIS. We didn't even know we needed to send them and wasn't stated anywhere by the government. So, we had to get our social worker to fax them to USCIS. We're hoping it doesn't cause a long delay. She faxed them today.