I posted this question in UK Guidelines forum and Malcolm responded that isn't a requirement in UK. UK donor centers guarantee that what is in the bag matches the label. It is not an FDA requirement for transfusion services to serologically confirm the ABO/Rh type of red cell components using rbcs from a donor tubing segment, it's the CAP, AABB, etc. I'm trying to drum-up interest in the transfusion services community to push their donor centers to implement the same practice in the US that UK donor centers do! Please don't tell me they can't do it! This is 2015, not 1980...