Del. Code Ann. tit. 21, § 3311
Return of license and transporter plates
84 Del. Laws, c. 302, § 3;
If a licensed transporter fails to renew the transporter’s license, or if the Division revokes a transporter license or denies the renewal of a transporter licensed under this chapter, the transporter must immediately return both the license and all transporter plates issued to the transporter.