The IPC 1860 was replaced by the BNS 2023 (in force 2024-07-01); no verified section mapping on file for Section 30 — confirm the corresponding provision (savings: Section 358, BNS 2023).
The words "valuable security" denote a document which is, or purports to be, a document whereby any legal right is created, extended, transferred, restricted, extinguished or released, or whereby any person acknowledges that he lies under legal liability, or has not a certain legal right. Illustration A writes his name on the back of a bill of exchange. As the effect of this endorsement is transfer the right to the bill to any person who may become the lawful holder of it, the endorsement is a "valuable security".