Hello my name is ***** ***** I will help you with this.
Are you intending to use a third party service such as Escrow?
No, Escrow is fine. That is because payment wont be released until you are named on the Web Registrar.
Therefore as long as you get this done, there is nothing else you need to worry about.
But until the Whois listing is updated, I would be release the funds.
Can I clarify anything for you about this today please?
https://www.escrow.com is the obvious choice.
Does that clarify?