When the organizers of the contest check Del's, Rodney's and Cassandra's passports to verify their identities, they fail to notice that Cassandra's last name is not Trotter, even though Del presented her as Rodney's mother.
This is not entirely correct, a woman is not obliged to take her husband's surname upon marriage.
This is not entirely correct, a woman is not obliged to take her husband's surname upon marriage.
The ending involves Rodney not being able to claim his Spanish lottery winnings because Del altered the dates on Rodney's passport to make him appear to be a minor. However, Del mentioned earlier that he was able to get away with the alteration because the dates were only written with a ballpoint pen, so there should have been nothing preventing Del from just changing the dates back to the correct ones.
It would be impossible to alter the date 1974 from 1962.
Albert tells Del to read page two of the winning letter, Del hardly glances at it when he acts disappointed. He couldn't have read and understood the letter in the fraction of a second from looking at the letter and reacting.