K-12 - Are students allowed to use WebCenter for replacement diploma requests? No. Students may call Herff Jones directly at 1.800.635.5670 for ordering assistance. Related to diploma Related articles K-12- How can our former students order replacement diplomas? Diploma WebCenter Help K-12 - Can a back-dated Diploma be ordered through WebCenter? K-12- How do I review my digital diploma proofs? K-12- What is a diploma proof?