When filing an I-140 petition subsequent to the denial of a previously filed petition, the same labor certification may be used even if it has expired, provided that it was not expired at the time the original petition was filed and it was not invalidated for reasons of fraud or misrepresentation. Should a petitioner require a new copy of a labor certification, (s)he can request a duplicate copy from the Certifying Officer, with proof that a visa application or petition has been appropriately filed.