[shoover4]

I've run across a few "authenticated" autographed baseballs that have a holographic sticker and serial number but no COA to go with them. For example, I'm looking at a Hank Aaron autographed ball with serial number K370535 and a Rose/Dimaggio ball with serial number 290054. I haven't been able to figure out who would have done the authentication (and hence if they were authenticated by someone reputable). Any suggestions on how I should proceed would be greatly appreciated.

[jonathani]

I can put a holographic sticker on anything. That does not change what it really is. You need to figure out what company or companies did the authenticating before going any further.

[djohn]

Most holographic stickers that are used for authentication will have the name of the authenticating company in the hologram. Most reputable ones have websites that you can look up the serial number to confirm an item's authenticity.

[jaykayzee]

I can put a holographic sticker on anything. That does not change what it really is. You need to figure out what company or companies did the authenticating before going any further.

Absolutely! I've seen balls that are simply "Game Used", from any game, and they had a MLB hologram sticker to certify that. The sticker might go with the ball, but have zero to do with any autos on it.

It could also be a sticker from anything stuck on to make it look official.