Read this and shudder:
PDNPulse
The very same thing happened to me recently when one of my ex-models had a severe bout of sudden amnesia.
"I don't remember signing any model release" she protested over the phone, having discovered her photo splashed all over one of our daily newspapers.
"You don't say," says I.
With not one but two lawyers on her side of the family, and endless amounts of dosh, I was in deep s**t without that MR.
End off!