Join Date: Aug 2011
Location: Barcelona, London, on a plane
Programs: IB+ Gold, TK E+, Hyatt Globalist, Marriott LTP, IHG Diamond
Posts: 14,213
No "IB" is needed. Just the number.
That said, it's been ages since I correctly received IB+ Avios on a Vueling flight. So don't hold your breath whatever format you manage to enter.