About us

PlatinumCOA is an autograph authentication service. We are committed to preserving the integrity of autograph collectors and the memorabilia they care about by verifying that all signatures are genuine, and we offer our services at a reasonable price.

We provide autograph authentication services for all kinds of memorabilia: photos, POP figures, baseballs, historical documents, jerseys, you name it!

We devote ourselves to providing the highest level of service possible.