Artists employ various techniques to sign or mark their metal sculptures, ensuring authenticity and provenance for collectors and galleries. Common methods include engraved signatures, stamped initials, or discreet markings on the base or underside of the piece. Some artists use unique symbols or serial numbers, while others incorporate their signatures into the design itself. For larger works, welded or cast signatures are often preferred. Documentation, such as certificates of authenticity, further supports the sculpture's provenance. These practices not only protect the artist's legacy but also provide buyers with confidence in the artwork's origin and value.