You can retract a message you sent to an informant. The message can be retracted even if the informant has already seen it. To retract a message, you must click on the arrow next to the message:
When you retract a message, the system will request a reason for retracting the message, for traceability purposes:
It will then appear crossed out for the owner and all the members:
But the informant will only see the information that the message was removed by the sender:
