[Marinocollector]

UDA that all of their autos are signed in person with a company rep.

This is far from a factual statement. UDA even states on the back of their cards:
This card was signed in the presence of a company representative and/or sent from, and certified as to its authenticity by, player depicted.

I even have UD signature card that explicitly state the card was NOT signed in front of a rep.

Both these COAs are on Marino autograph cards, a former UDA client.

To go one step further, back in the day, Phil Hughes (NY Yankees pitcher) was frequently posting in the baseball forum showcasing cards before and after he signed them. He revealed that he was signing them without being in the presence of a UDA Rep. That he was sent a box with cards with stickers showing were to sign the cards.

Also, the Reps of these card companies are often nothing more than local dealers. It would be too costly to do a signing AND fly people all over the US, so if there is an able and willing dealer in the network nearby, UD would send the card dealer.