Applying for reimbursement with a temporary social security number

My temporary social security number as an Auto Entrepreneur starts with a 2. Can I apply for a reimbursement? Should I send a copy of my business registration documentation with the claim form which verifies this temporary number?

Do I need to send the original paper for reimbursment? In case something goes wrong I don't want to be stuck without possibility to be reimbursed.

I have submitted the documentation to my health fund and am waiting for my permanent number, but in the meantime I need to know if I should hold on to the medical forms or submit them.