We've received information that the No campaign intend to engage in Trump style voter suppression methods by trying to get their people appointed as impersonation officers to challenge yes voters for ID. Be sure to bring ID when you go to vote on Friday, the polling card is not ID
Valid ID includes (i) a passport; (ii) a driving licence; (iii) an employee identity card containing a photograph; (iv) a student identity card issued by an educational institution and containing a photograph; etc.
Voter suppression though demanding ID is a major tactic used by the right in US election, often accompanied by the sort of scare stories that No leaders have been putting out during the week. The method is to target polling stations which they know would have a large Yes votes in the hope that a couple of percent of voters may only have brought voting card presuming it counts as ID (it doesn't).
Obviously if this is only done at stations with large Yes votes and not at those where a No majority is expected it can tilt the overall vote in a very close election.
As we currently understand things while they can appoint observers these people are not allowed to have campaigned in the referendum and are not allowed challenge voters themselves, they can only observe to confirm that the presiding officer does so.