I once had a visit from cops about dodgy cheques I had been writing. Weirdly they were more ready to believe I hadn't written the cheques, than the were about me not leaving my chequebook at a brothel I hadn't visited.
The last time I wrote a cheque I had to cross out the 19 to write in the year. I think they only gave up on that line of questioning when I provided enough evidence to say that the bank had not given me any chequebooks to lose.
I still don't really know what happened there, the best that I can think of is someone with access to the mechanism to print chequebooks was running off 'replacements' for random accounts and then passing them on to people. I'm guessing it counts as identity theft.
Identity theft is not helped by processes that demand certainty and expediency causing pressure on employees to provide both even when they are not available. In a similar credit card issue with my partner, after all of the mess of departments trying to make it other departments' problems, my partner received an email saying that; in accordance with the phone conversation, the issue had been resolved. Having had no such phone conversation this caused a bit of panic, but upon contacting the bank they said that they had tried calling but there was no answer, but they were not allowed to resolve the issue unless they had directly spoken to the customer, so she just wrote that in, otherwise it would keep on causing problems down the line.
On the other hand I have leveraged such processes to my advantage to essentially steal my own identity. For a long time I possessed no photo-id, It was actually buying a house that proved to be the intractable problem that forced me to get a passport (I also wanted to travel) . There were numerous things that required photo ID to exist even if they had not laid eyes on it themselves. It seems rather odd to me, but somehow just the idea that I have it seems enough. Luckily I was once in a situation where I needed photo ID at a time when there was sufficient context to prove my identity by other means. A staff member fudged the system to make it work. That resulted in me acquiring a form of non-photo ID that had been recorded as being verified by photo ID. I leveraged that as a form of pseudo proof-of-photo-id for a number of years.