-You still can ask your formal supervisor to give you a verification letter even if he/she left the company (he needs to address that he was your supervisor during he served the company)..
还有另一个十年前的雇主都没什么联系了,他们HR估计连我payroll的记录都没了,
但是我有当时离开时他们给我的推荐信。
-That letter is helpful.
类似的情况大家一般都怎么操作呢?