charlie
the get isnt called a posul get after its been given. the woman saves it. if a shaila should arise regarding the divorce she would present it to Bais Din. they would examine it, question witnesses, determine if the get was kosher or pasul, its not pasul because it was given. just like a receipt for a payment isnt pasul, or a shtar used to purchase land isnt called a pasul shtar after its given