Urdu NN par stamp hai union council ka? For e.g on top of my Urdu NN there is a stamp in English which says "Record Keeper, Arbritration Council, ICT, Islamabad". this is of Union Council. Then at the end of NN there should be "Nikkah Registrar kay dastakhat and mohar" (stamp and sign) and also " Nikkah khwah kay dastakhat". This is what you need to tell them that you have these seals.
Also tell them that this is your copy of NN, a separate copy of Union Council has already been submitted to the Union Council. Try to gather proofs related to registration of NN from the union council as discussed in my previous posts.
Noelw coming to ur Marriage certificate. The top should read Marriage Registrauon Certificate as well as name of the union council of the area. You need to explain that this means that your marriage is registered in the govt records through this union council after your submitted your NN.
Towards the end of the Marriage certificate, it should mention that your "marriage was solemnized and registered by xxx" which is the same as written on the NN. give attention to the Entry and issue date of Marriage caettocate.
At the end there should be a seal on the Marriage certificate of the union council. Min3 says Chairman Arbitration Council ICT Islamabad and it signed.