Character Boost WoW Classic

Hi. Back in March-ish, my kid boosted a toon without my permission. I had gotten a refund for it. The character is still there as level 70 but unplayable. My question is, if i decide to reactivate it, would I be able to immediately transfer it to a new server since it was technically created back in March? I need a for sure answer before I spend money on it. Thanks.