I collected my new ASIC in February, a month after I could have. I was interstate at the time. At XXX airport I had to show my then ASIC (expired) to the so called security guy. He noted it had expired. I said the new one was ready to pick up. So he rang the good bergs at Merimbula and got a confirmation that I was ridge didge. Then I got to get to airside and my aircraft.
OK. So I duly picked up my ASIC and as required I gave in my old card.
About four months later I get a letter in the mail. It was threatening me with severe consequences if I did not immediately had back the old ASIC card. Jail and big dollar fine.
I sent back an email, 'Good luck'. Never heard another word.
Perhaps they had caught up with the paperwork by then.
Next time I have to do an old for new ASIC card I will take a pic of the ASIC bod with my phone to ensure that they do not run a repeat.