You should ask your academic mentor in the first instance. You must ask a potential reference in advance of putting their name and contact details on an application form for their permission to do so. It is good practice to let them know in advance of any upcoming applications, when they can expect to contacted and provide them with any information that would be helpful. It is unreasonable to expect a reference to be completed with only a few days notice, so please be mindful of timelines and make sure you provide your reference with enough notice. You can also ask previous academic mentors, your class teachers or academic staff who have taught you for a reference where relevant.
If a company requires a verification of your qualifications, this is a separate process they should undertake and you should send the company this link. Departments and academic staff will not be able to provide official verification of qualifications or marks.