Salve! My .02 on having Koha accept two same barcodes - bad pie! That's one of the things I intentionally checked for when I installed. Perhaps there's a way to do a feature so that folks that don't want barcodes can shut it off, but I shudder to think at the possible multiple barcode errors that might haunt me later. I know it will catch multiple borrower ids in its own comma'd way, and I know that it used to yell at me when I used the same barcode, which I liked. As far as what you might be able to do about your branches - talk to your vendor and consortium about adding initial digits to distinguish between the branch and the main library. There might be a way to cleverly do this retrospectively. I know that there was a good old function key programmed at my old library, and I usually keep the 304540000 part of my barcode in a notepad file for ease of cutting and pasting. I can't think of any ILS off of the top of my head that wouldn't have the barcode function also as an identifier. Brooke @ Hinsdale