those docs could have come from anywhere their filing cabinet even here on CAG and all they have done is insert your name in two places.
there is no indication of how you signed up for this card in their WS
there is no time or date or IP addressed evidenced either.
that's why they are calling it a recon.
they need to provide proof of how and by what method you signed up for this credit.
Beware using the word "mitigating". That is only if you're admitting it and asking them to be lenient because x,y,z or whatever.
You are not admitting it so there can't be anything to mitigate something you didn't do.
Don't touch them owe me £500 since January 2019 make excuse after excuse. Seem they always have software problems sending money out. Keep saying they will call back or email nothing been chasing it now for 6 mths the phone staff always have the same banter we will chase it up and get back to you then nothing!