I’m not a fan of the service, but they have a warranty of sorts. That is an implicit admission tat nothing is 100%. If Lifelock honors their warranty, that should be the end of it.
The warrantee ain't what it used to be. They originally guaranteed to make good any identity-theft related losses a customer might have up to $1,000,000. But if you listen very closely to their advertising, you will notice that now they only agree to provide up to $1,000,000 of service to eliminate the identity theft, but make no offer of reimbursement of losses.
So the $1,000,000 is essentially meaningless, since no identity theft case is likely to require even a small fraction of that amount of work to correct.