IM Wales last year my brother and I picked up our race packets on the Friday, drove back to his place an hour or so away, then drove back down on Saturday with our bikes and gear for race weekend. When we got there we realised our bike numbers had gotten shredded by the wind on the mostly highway drive down there.
Went back to packet pickup and the girl there just wrote our numbers in black sharpie on blank white stickers and gave us those. I was expecting at least printed ones or something. Nobody ever questioned the stickers either.