The trouble is, like parking tickets, you usually can't pay a fine without the correct reference number. I had a hell of a time when I moved to the UK trying to chase down a toll fine I knew I had incurred in Ireland but the UK company who administered it flatly refused to give me the fine's reference number to pay and kept increasing the fine in the meantime. The notice went to my old address so while I knew I needed to pay it as I'd driven on the toll road around Dublin, I didn't have any way of paying it as they wouldn't give me the info I needed to actually pay it.
Being from Donegal, I had seen the signs but had no fecking clue how to sort it out as I wasn't a regular around that road, and I wasn't driving back to bloody Donegal from London to pick up a fine notice! It ended up costing £140 which was less than the ferry if I'd gone back to get the letter they refused to reissue to my new address.
And I only got it sorted because they finally made a mistake by using the reference number I needed (that they were refusing to give me due to "data protection") in an email subject line so I tried putting it into their system and finally managed to pay the bloody thing.
I think places that put unreasonable barriers in the way of people paying fines should automatically be barred from collecting those fines.
The council are being twats and should just sort it out so she can pay it.