I mistakenly issued an advance payment to one of our supplier. 

Two days later, the supplier returned the full amount. 

I have already recorded the initial vendor payment entry and now need to document the return. In Odoo, I created a customer payment entry for the returned amount.

 How can I properly reconcile the vendor payment entry with the customer payment entry, considering we are also using bank reconciliation(So reversal of posted vendor payment not possible)? 

I tried reconcile from journal item system not allowing.

One more I paid returnable rent advance; after one year they are giving back us. How to show the documentation in Odoo?