Few Steps to get the domain transfered from one registrar to another.
Domains like .com, .net, .biz, .org

* Some of the registrar follows the new transfer method where in the
system requires EPP code stands for stands for “Extensible Provisioning”
Protocol we can call it as “authorization code”

* A EPP/authorization key is a combination of alpha-numeric characters.For
Example : A ” made up ” EPP key** would look something like this:
X9S03ZQ5490KJ32AM.

* unlock the domain first

* Get EPP code from the current registrar

* Once the EPP code is received by the registrar he initiate the
transfer request towards the old registrar and as soon as the request is
approved the domain starts migrating, at the most it take 7 to 8 days for
the complete transfer.

NOTE: Authorization (EPP) keys are a security code required by the registry
for domain transfer, thus are unique to every domain name. No two
EPP/authorization keys are the same, thus if you are transferring more than
one EPP domain, you will need to obtain each domain’s specific code.