NS records different then domains ACTUAL Name servers?

[MichaelJ]

Ok, hope i dont confuse anyone.

Say you have 2 name servers, ns1.newhost.com and ns2.newhost.com.

You have a domain name, domainname.com, whose official name servers in
it's WHOIS record is ns1.oldhost.com and ns2.oldhost.com.

Say we create the EXACT same record on newhost's name servers as
exists on oldhost's name servers, including the NS records.
then, we go to the Registrar and modify that name servers to
newhosts's.

So that the whois record might look like this:

ns1.newhost.com
ns2.newhost.com

And on ns1.newhost.com and ns2.newhost.com, the DNS record looks like
this:

domainname.com.          IN NS  ns1.oldhost.com.
domainname.com.          IN NS  ns2.oldhost.com.


Now, will this work? Will the DNS request be forwarded over to the
oldhost.com's name servers, and the record grabbed from there?? A
client wants us to do this, but we've never done it before.