You can still write off a No Bid X .0001 security without an actual sale of the security. Such worthless security write offs are allowed especially in cases like a Global Lock is in place. Although some brokers may allow a Custody Service transaction to dump the stock not all do.
Yes the stock could trade again in that case and the customer could see profits even.
Would I chance this transaction? Probably not, I would rather go for the "Penny for the lot" sale and avoid having to provide the details of a dead end stock.
Market Data 
Markets 
AI
