I went back to check. All were puchased with Netbanking payment on AIs website or app.
Ticket in January (India-Germany):
CARD TYPE: CASH
CARD NO.:
AUTH CODE:
ENDORSEMENT/RESTRICTIONS: NON-END/VLD ON AI FLT ONLY/
AIBExxxx/BILLDESK.RED
Ticket in July (domestic DEL-CCU):
PAYMENT TYPE: Bank transfer
BANK: HDFC Bank Limited
ENDORSEMENT/RESTRICTIONS: ENDOS NON-END/VLD ON AI FLT ONLY
Ticket in November 2017:
PAYMENT TYPE: Bank transfer
BANK: HDFC Bank Limited
ENDORSEMENT/RESTRICTIONS
ENDOS NON-END/VLD ON AI FLT ONLY
Mobile app in December 2017 (domestic BOM-CCU)
AGENCY/AIRLINE NAME: E MOBILE APP AIR INDIA NEW DELHI, IN RESTRICTIONS: AIMA11xxx7/BILLDESK/LHDFxxxx0/NON-END/VLD ON AI FLT ONLY/ FORM OF PAYMENT: MISC/PG/PAY/LHDFxxx0