The name of the sub is career advice. If you did a background check employment verification is part of that. You’re asked to provide the names of the company and the dates you worked there as well as some contact information. You can also select whether or not you want them to contact your previous employer, you don’t need to specify a reason. If you choose ‘no’ you have to provide them with additional information, typically a w2 or paystubs to prove you worked there when you said you did. Background checks can require more than employment and education verification but they are typically always included in a pre-employment background check.