Professional Stamp Experts (PSE) is a leading postage stamp grading and certification service. Their certifications are recognized as helpful references which can assist hobbyists in making current buying decisions. Towards that end, Stamp Smarter is pleased to offer a fully searchable database of PSE certifications for US, Canada, CSA, and Hawaiian stamps. Images and data are courtesy of PSE. Hobbyists who are interested in procuring certifications or grading for their stamps can learn more on the PSE website.
This database covers certifications issued over the last ten years only. Updates will be made periodically. Current update includes certifications through 4/6/2023.