You can also include airline data into the capture request. For more information, refer Capture with airline data.
Mandatory sub-lines
The 
  Capture
 sub-line described below is mandatory when submitting a payment capture request.
Capture
This sub-line holds information about capture modification requests.
| Field # | Format | Required | Description | 
|---|---|---|---|
| 1 | Fixed value: SL |  | Record type identifier | 
| 2 | Numeric |  | SLsub-line record number reference within its parent line.The counter starts at 1, and it increments sequentially by one unit. | 
| 3 | Fixed value: Capture |  | Transaction type. Defines the required field types for the specific sub-line. | 
| 4 | Alphanumeric |  | The original payment PSP reference. | 
| 5 | Numeric |  | Amount. | 
| 6 | Numeric |  | The currency exponent. | 
| 7 | Alphabetic |  | The three-character ISO currency code. | 
FH,1.0,TEST,Company,TestCompany,Default,3,ws@Company.TestCompany,Modification,FileHeaderEchoData 
BH,1,BlockHeaderEchoData 
L,1,MerchantAccount,TestMerchant,Capture,Test Product 3,EchoData 
SL,1,Capture,9145754231690158,100,2,EUR
BT,1
FT,1