I must say that it's one of the most remarkable coincidences I've heard of.
The prisons former art teacher also claims to recognize Doige (with an E) as a former student and claims to remember him painting a painting at least very similar to the one in question. The owner of the painting also claims that the person he bought the painting off of joined the Seafarers International Union shortly after he bought the painting off of him and the Seafarers have a record of a Peter Doige during that time, but not a Peter Doig.
I'm not sure why you so quickly cross that idea out when there are millions of dollars on the line. I'm sure if Doig's paintings were worthless this case wouldn't be seeing the light of day. There is a plausible reason for purposeful deceit in trying to pass Doige's painting off as Doig's painting so the owner could profit millions.
If the painting was completely worthless I'd be inclined to believe that there isn't a chance in hell of purposeful deceit going on because there wouldn't be motivation to do so.
Yes or no please.
It's just a different man from Peter Doig.
It's not a "forgery" made after Peter Doig became famous, there was no purposeful deceit here; it's simply another painting from another person who happens to have a similar name. It's coincidence.