How does refundable vs unrefundable OBC get applied? I have OBC from a variety of sources, and I have no idea which line item is for which credit. There are no codes listed next to the line items on my account where my OBC credits are listed. I got some from my TA, some as an incentive from NCL for booking, and I believe some as a shareholder, but it's impossible to tell which is which, which is refundable, which one gets used first against room charges, etc. I'm no stranger to cruising, being Sapphire on NCL,and high status on other lines, but this has me befuddled.