Form-C declaration misuse warning highlights invalidity of missing forms and legal risk from unauthorized trade use. Public notice under Rule 8(13) of the Central Sales Tax Rules, 1957 informs that specified Form-C declarations reported lost, destroyed, or stolen are invalid for unauthorized use. It cautions that any trader using the missing Form-C declarations will act unlawfully and be subject to legal action under applicable law. The notice identifies the affected dealer and the Form-C serial numbers reported missing, and serves as a trade-compliance warning against acceptance or use of those declarations.