Once the case is closed for 5 business days, we can not change the case details or reopen the case. If the case is closed for less than 5 business days, the tech should be able to either reassign the case or add a secondary contact for you. If the case has been closed too long to alter it, you can always open a new case and reference the old case number in the new case, so we can tie the two together in our system. I don’t think that would let the new owner see the old case from a different account, but the tech would know the origins of the new case and be able to write out a summary of the old case for the new case if needed.