colin123456
It's the DWP that has passed your name onto an Assessment Provider.
You can try contacting the DWP to have the requirement withdrawn, however, this is unlikely to happen without an escalation to a Manager and even then might not happen.
If you do not attend the assessment without notice then you will be moved back into the Job Seeking group.
You can try postponing this appointment, you can only do this once. Failing to attend this second one will see you re-grouped as above.
If you do attend and are placed in the LCWRA group, the higher of the two, then you will be entitled to a back payment of the LCWRA rate from the beginning of 14 weeks from when you first presented a Fit Note.
If you are assessed as having LCW, the lower group, then you will not receive a back payment but you will still be excused from seeking work.
Gordon
Nothing on this board constitutes legal advice - always consult a professional about specific problems