Is my work experience from 2017 to 2020 valid for university applications and do I need to provide offer or relieving letters in UK?

Yes, your work experience from 2017 to 2020 is valid for UK university applications if you can provide proper documentation.

- Experience letter on official company letterhead (detailing your role, duration, and responsibilities) is usually required. - Offer letter is helpful but not always mandatory if your experience letter is comprehensive. - Relieving letter is generally not required but can strengthen your application if available.

Other documents like appointment letters, reference letters, or salary slips can also support your experience if needed. Requirements may vary by university.