What 'no email set' means
Sellers use 'no email set' or 'unregistered' to mean the account has no email address attached to it, so you, the buyer, will be the first to attach one. Some are old accounts created before an email was needed; others have had their email removed before the sale.
That is a genuine advantage over an account still tied to someone else's email, which you can never fully control. But the label only describes the account's state today. It says nothing about who created it, who has held it since, or what they still know about it.
Why recovery is still a risk
Account recovery does not rest only on the current email. Someone who can show they created the account, or who knows enough of its history, can still try to recover it. That includes the original creator and anyone who held it between them and you.
So an unregistered account is not automatically low-risk. One that its seller made and played themselves, never sold before, is a much stronger purchase than one that has been flipped several times and had its email stripped before each sale. The label is identical in both cases; the risk is not.
Recoveries can happen weeks or months after a sale. If you have already confirmed delivery by then, the payment has been released to the seller and escrow has nothing left to hold. That is why the checks belong before you confirm, never after.
Questions to ask the seller
Ask in the order chat, where the answers stay attached to the order. Did you create this account? If not, how long have you held it, and who did you get it from? Has it ever had an email set, and if so, when was it removed? Has it been sold before? Has it ever been banned, muted or recovered?
A seller who built the account and says so in writing is giving you something worth paying for. A seller who will not answer, or answers only in a private message, is telling you something too. Vague answers are a reason to pay less or walk away. Valuing an account explains how much email status moves the price.
What to do straight after the handover
Before you confirm delivery: attach your own email, set a strong unique password, turn on an authenticator and set a bank PIN. Then log in and check the account matches the listing. Securing a bought account covers each step and the order to do them in.
Only confirm once all of that is done. Until then, escrow is still holding the payment, and opening a dispute freezes it for review. Confirm early and you give that up for nothing.
The part no check fixes
Buying any account breaches Jagex's terms, and an account can be banned whoever sold it and however carefully you secured it. Escrow protects your payment against the seller, not the account against Jagex. If you are still deciding where to buy at all, where to buy OSRS accounts compares the options honestly.
The short version
'No email set' means you will be the first to attach an email, not that nobody else can recover the account. Ask who created it and how many times it has been sold, in the order chat, before you confirm.