Please be aware that the receipt number listed on a receipt notice for Form I-751, Petition to Remove the Conditions of Residence is not the actual receipt number for that case. In fact, if the receipt number shown on the receipt notice for the I-751 is tracked through the USCIS online case status, an error message will appear. The correct receipt number for an I-751 is listed on the I-751 biometrics notice. USCIS has been made aware of the problem, but not time frame has been given to correct this.