We are a 3PL and when we receive stock for different customers we would like to put a reference of where the stock was from (supplier). We add this to the 'special instructions' after the PO is in CC but potential to forget and other staff not as vigilent leaves this information not being recorded at times. Would be nice to have a second reference field at least to record where the stock was sent from for transparency at a later date rather than pull out the paperwork months later.