Authenticating signatures or marks on porcelain sculptures requires a combination of technical expertise, historical knowledge, and advanced tools. One of the most reliable methods is consulting a certified appraiser or ceramics specialist who can compare the signature against known artist marks and stylistic traits.

Scientific techniques like ultraviolet (UV) light testing can reveal inconsistencies in glazes or restoration work, while magnification tools help examine brushstroke details and aging patterns. Cross-referencing with historical records, auction catalogs, and manufacturer archives also provides valuable context.

Additionally, thermoluminescence (TL) testing can determine the approximate age of the porcelain, helping verify authenticity. For modern pieces, contacting the artist or studio directly may yield confirmation. Always document the mark with high-resolution photography for further analysis.

Combining these approaches minimizes the risk of forgery and ensures accurate attribution of porcelain sculptures.