Recently during play of Storm King's Thunder, Chapter 5 we rolled up a cursed magic item Dust of Sneezing and Choking. This item appears to be a beneficial magic item upon use of an Identify spell.
Because Adventurers League (AL) requires that all magic items are given a certificate for official play, the certificate would result in either of the following scenarios:
a) The certificate displays the true name of the magic item, in which case the player will know it is cursed thereby spoiling the main purpose of having secretly cursed magic items.
b) The certificate displays the false name of the magic item, in which case the player could take it to another table where a new DM is unaware of the item's true quality and it would play there as a beneficial item.
What is the right way!? Is there an officially AL sanctioned way to handle disguised cursed items?