Originally Posted by woodrow1029
Not necessarily. If you didn't see it land, it's acceptable to ask your partner if he/she is sure of the call. Remember, you don't have to agree. You just cant disagree, and you can't both be unsure.
None of these rules matters to those who willfully cheat.
The bottom line is this is an honor system and only works if people go by their honors. Agreement, disagreement, second guessing partner is all moot point because people, cheaters will learn quickly and do things that favor them.