Approver Not Selectable to the Workflow

Why doesn't a user appear in the drop-down menu when selecting an approver?

When trying to add an approver, sometimes that user does not appear in the drop-down menu. In the picture below an approver "Claire" is not displayed.

Troubleshooting

If you are unable to find an approver from the list, please verify the following details:

1. Check the total amount of the invoice on invoice header.
   1. If the user's approval limit is lower than the invoice amount, the user cannot be added as an approver to the invoice.
      
      
      
      
      
2. Check, which company has been selected for the invoice.
   1. The approver must have same the company assigned in user management.
      
      
      
      
3. Check, which invoice type is selected for the invoice header.
   1. The approver must have that same invoice type added in the approval limits section in user management.
      
      
      
      
      
      
4. Check the currency selected for the invoice.
   → If the currency is different in the invoice header and in the user's approval limit setup, Dooap will calculate if the approval limit exceeds using currency rates (works only with the most common currencies like EUR, USD etc.).
   → Uncommon currencies should be added to user's approval limits.