"SENT TO ESRF" requesting Transport Courier company?

We had the feedback from the stores that searching for a parcel would be easier for them if they knew which transport company was used. This is not urgent but I thought that when we put the parcel in "SENT TO ESRF" status one could ask the user to fill in the courier company name (and tracking number if they wish) - a similar dev as for dangerous goods. I don't know what you think..