Federal Board of Revenue has issued letter ref : 1(120)SS(BDT)/2017-BTB/141252  dated November 20, 2017. Through the aforementioned Letter, FBR has informed that each withholding agent can verify originality of Online Exemption Certificate by click on the link mentioned (Also please see the link below)

https://e.fbr.gov.pk/esbn/

Please click lick mentioned below to read the complete Letter from FBR IT Wing

171124-387.1-Online verification of Exemption Certificates