At our center it is a skilled job, being that you get paid the +$1, however our special (ed.) management pays unloaders that +1 too. I do however think it is a skilled position, knowing how to correct all the possible different flaws in an address are a skill, knowing when that street doesn't exist in a zip code and knowing where that street does takes skill, knowing when an address is correct but still comes up Not In System takes skill, and being able to do it as fast as the sort goes takes skill. This is just my experience in my small center, we only have 1 clerk so that person gets to do everything, in a larger center you may be one of many and just fix blank labels.