I've had the score-alert thing going on Equifax for the past year plus and dutifully each month the service comes back with a score in the 700-710 range.  Then today, for kicks, I got a report (through MyFICO) for the other two services.  So the three reports on the same day gave me:

 

Equifax - 708

Experian - 714

TransUnion - 760

 

That seems like quite a spread to me.  Since you never know which service someone will use, what to do about this?  Is the spread normally this large?