Answer
If you are quitting-no. if you are accepting a different job within the same company, as a part of re-training or because it is less deblokeding, than you will need to provide them the restrictions the doctors provided you.if your disability is work related, they can get that directly from your doctor. they maybe trying to avoid wanting to be accused to letting a sick or injured person go and the say you will be suing them for firing you because you were disabled.otherwise, just give them a letter saying you would like to resign effective xxx.you are under no legal obligation to produce any reason for leaving a company. last i heard sla was abolished. if you have a serious concern, you can usually get a free consultation with an attorney. i do wish you improved health and hope you get better-god bless you and those who know you