I am working in a new company now.
At previous company, I was working for a year.It is a small company which has 10 to 15 staffs. I passed the probation after 3 months, but there is no documentation, just an email. I continued working. I leave there after I worked 1 year. I sent the employer a resignation email. We had a short leave interview and He agreed me to leave.
I don't have any letter to prove my previous employment. Now, I want to prove my past workplace and past working period. What can I do?