Lets assume everyone is a good guy. It still might be different for every breeder. You would have to ask them what their guarantee actually means. Giving a set amount of years imo has too many factors that have nothing to do with genetics. Look at MarkS example, in the 5 years, he only produce actual offspring 1 year, its great that they proved out eventually, but what does non-offspring years have anything to do with it having the genetics or not? Thats really not fair to the breeder imo. I have also seen some breeder say after X amount of clutches I will do something. Well still a big factor would be the amount of eggs, what if one snake only produces 3 eggs a year for 3 years, while one snake produces 9 in one year, doesn't that give the same statistics?

What makes most sense to me would be to say after X amount of eggs from a visual x het breeding or X amount of eggs from a het x het breeding, I will do something . Missing a visual on a visual x het breeding after 7 eggs gives you less than a 1% chance of the animal being het statistically. 17 eggs for a het x het. It would depend on the breeder how many eggs they feel is enough to honor their guarantee. But then again for a het x het, I think you would want both animals to be from you, how do you know the other animal is actually het also?