Vendors have their own tab in zistemo. You can save all Vendors information by going to Contacts -> Vendor.

Click “Add Vendor” to create a new one:

Here you can add all the vendor information you need – Vendor Name, Number, Currency, Language. Use tabs like ‘Vendor contacts’, ‘Address’, ‘Vendor default settings’, ‘Bank information’ for extra details you need to have.

So now you can choose these vendors when you create an expense:

By the way, you can just enter the Vendor Name to the Expense Vendor field and not just pick it from the dropdown – in this case, zistemo will automatically add this vendor to the existing list.