XRK wallet seed phrase is the unique string using which you can recover the wallet private & public key pair. There is an optional password which may setup & then it will be required while retrieving the private key. Please make sure you do not forget that password. Because if you do, you will recover the different wallet than what you supposed to retrieve. 

So seed phase along with the right password is the ultimate recovery method. Both have to be right to recover the wallet properly.
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