Tran_type can have: auth/sale and refund/void/capture (All properties)
 
First Payment Request can have
 Tran_type : auth or sale

 2nd request on the same payment, can have
 Tran_type : refund or void or capture

 If the first payment request is Tran_type: sale "means direct captured"
(you can hit "refund" if needed)

 If the first payment request is Tran_type: auth "means amount will be on hold(authorised) for a certain period/days"
(you can hit "void" to reverse the payment during the holding period)
 OR 
(you can hit "capture" with full/partial amount to deduct the payment from that holding amount)
 But
 
(You can not hit “refund” on the auth/holding amount, until it's captured/direct-sale)

  
 if you hit a partial capture, the remaining amount will be reversed back automatically after completing the holding period.
 

 Note: If you do not hit any void/capture on that holding amount, the full amount will be reversed back automatically after completing the holding period.
 
 
 auth
(authorization): this feature should be enabled on your Paytabs account before to use.