4M,9B,9W,A3,AA,AC,AE,AF,AH,AI,AM,AP,AS,AT,AV,AY,AZ,BA,BD,BE,BG,BI,BP,BR,BT,BU,
CA,CI,CM,CO,CS,CX,CY,CZ,DL,EI,EK,EY,FI,FJ,FM,FV,GA,GF,GT,HM,HU,IB,IC,IG,IN,IR,IT,IY,JJ,
JK,JL,JP,JU,KA,KC,KE,KF,KK,KL,KM,KQ,KU,LA,LG,LH,LO,LP,LR,LX,LY,MA,ME,MF,MH,MI,MK,
MN,MP,MS,MU,MX,NF,NH,NW,NX,NZ,OA,OK,OM,OS,OU,OZ,PG,PK,PR,PS,PX,QF,QI,QR,QV,
RA,RB,RJ,S7,SA,SB,SC,SK,SN,SU,SV,SW,TA,TG,TK,TP,UA,UL,UN,US,UX,VK,VN,VS,W5,WF
,WY,XL,XR,YX,ZH

• Revalidation of electronic ticket, where itinerary/ticket contains coupons/segments of Singapore Airlines/SilkAir (MI) only: please contact Singapore Airlines for revalidation.
  Telephone 0900 88 18 18 (CHF0.50/Min)
  email: zrh_reservations@singaporeair.com.sg
• Revalidation of electronic ticket, where itinerary/ticket contains coupons/segments of other airlines than Singapore Airlines and/or Silkair: please reissue ticket.
• Revalidation of electronic ticket, where new itinerary contains stopover instead of transit in Singapore: please reissue ticket and collect Singapore Passenger Service Tax (SG).
  

• The name indicated on the ticket must be similar as indicated in passport.
• For a name correction, (e.g. spelling mistake) please contact Singapore Airlines for assistance.
  Telephone 0900 88 18 18 (CHF0.50/Min.)
  email: zrh_reservations@singaporeair.com.sg
  You will be promted to provide the correct names and the name correction will be done within the Singapore Airlines System. Due to technical constraints, the name correction will not appear in your CRS. You are required to contact your CRS heldpesk, to get the name rectified. For approval, a vendor remark will be provided from Singapore Airlines. Once the name is modified in your CRS, you will be able to issue the electronic ticket.
• Name change, where the intention is to replace original passenger a different person, is not permitted.

• The issuance of an electronic ticket on a passive/artificial booking is possible.
• Important: the passive/artificial booking file shall contain entirely passive/artificial segments only.
  The issuance of electronic ticket within a passive/artificial booking file, containing active/live segments as well as passive/artificial segments is not possible.
  For Touroperators/Brokers: please contact Singapore Airlines for assistance.
  Telephone: 0900 88 18 18 (CHF0.50/Min.)
  email: zrh_reservations@singaporeair.com.sg
• All the data of the artificial booking must be similar to the active booking otherwise the segments in the artificial bookings will immediately set on HX status. After issuance, please cancel the artifical booking and verify, that the electronic ticket number is correctly indicated in the active booking.

The Singapore Airlines Vendor Locator of the active/live booking, has to be added to the passive/artificial booking:

CRS entries (YYYYY denotes SQ vendor locator)

• Galileo 0 SQ345 Y 21APR ZRHSIN AK1 // RL.SQ*YYYYYY
• Amadeus: SS SQ345 Y 21APR ZRHSIN PK1/YYYYYY
• Sabre: 0 SQ345 Y 21APR ZRHSIN QK1*YYYYYY
• Worldspan: 0 SQ345 Y 21APR ZRHSIN MK1 followed by .1A-HDQSQ YYYYYY

IMPORTANT: ONCE THE ELECTRONIC TICKET HAS BEEN ISSUED, PLEASE CANCEL ALL PASSIVE/ACTIVE SEGMENTS AND BOOKING FILES!

• Issuance of other airline segments on Singapore Airlines Document (618)
  
  It is not permitted to issue an Singapore Airlines Electronic Ticket (618), containing solely segments on other airlines than Singapore Airlines (SQ) and/or SilkAir (MI).
  
• Electronic ticket number in booking file
  
  There is no need to indicate the electronic ticket number in the service information field (OSI / SI) by applying the TKNE entry. The system of Singapore Airlines retrieves the relevant ticket data straight from the electronic ticket mask and transfers the ticketnumber automatically into its own ticket number field. Therefore nil action is required should you not see the TKNE entry in the OSI/SI box of your booking file, based on the fact, that the electronic ticket has been issued within the same booking file.