The procedure to transfer your holdings varies from broker to broker. If you want to transfer your shares from other broker to Fyers, all you need to do (along with the procedure required by your broker) is to provide the CMR (Client Master Report) to your broker where your details such as PAN, Name and Demat number would be mentioned.
CMR copy is nothing but the welcome letter which you receive via email from us after opening your account. You can get it from there. In case you are not unable to find it, you can reach out to us at email@example.com.
Hope this clarifies!