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BI ETKT:INVALID FARE BASIS

A practical guide for travel agents on fixing the Fare Basis hyphen error in Amadeus — why special characters in the TST block ticketing and how to correct the entry with TTI.

The Fare Basis hyphen error is a common Amadeus ticketing error that appears at the worst possible moment — when you are ready to issue the ticket and the system suddenly blocks it. The cause is not the fare, the itinerary, or the passenger data. It is a single special character hiding inside the Fare Basis field of the TST. Amadeus does not allow hyphens, slashes, asterisks, or any other special characters in that field, and when one is present, issuance is refused. This article explains exactly why the error happens, how to edit the Fare Basis correctly, and what the character limit is so the ticket issues without further problems.

Why the Ticket Issuance Is Blocked

This error appears when the agent tries to issue the ticket, but the system blocks it.

The reason: the Fare Basis field inside the TST (Ticket Mask) contains a hyphen -.

The Amadeus system does not allow any special characters — such as -, /, *, and others — in the Fare Basis. Only letters, numbers, and spaces are permitted.

Solution: Replace the Hyphen with a Space

Step 1: Edit the Fare Basis in the TST

Open the TST and locate the Fare Basis field. Remove the hyphen and replace it with a space instead — not with a slash, a dot, or any other character.

Step 2: Apply the correction

Change this:

ZLWR-CH1T

To this:

ZLWR CH1T

Step 3: Reissue the ticket

After this correction, the ticket will issue successfully. No other changes to the PNR or TST are required.

Additional Information

For more details on editing the TST, refer to: HE TTI
Maximum length for the Fare Basis is 15 characters, including spaces.
Only letters, numbers, and spaces are permitted — no hyphens, slashes, asterisks, dots, or other special characters.

Quick Fix Checklist

Confirm the error appeared during ticket issuance.
Display the TST and locate the Fare Basis field.
Check for any special character, especially a hyphen.
Replace each hyphen with a single space.
Verify the Fare Basis does not exceed 15 characters.
Save the TST edit and retry the ticket issuance.
Confirm the ticket issued successfully.

Frequently Asked Questions

Why does a hyphen in the Fare Basis block ticketing?

Amadeus does not allow special characters in the Fare Basis field. Only letters, numbers, and spaces are permitted, so a hyphen triggers the error.

What should I replace the hyphen with?

Replace it with a space. For example, ZLWR-CH1T becomes ZLWR CH1T.

Is there a length limit for the Fare Basis?

Yes. The maximum length is 15 characters, including spaces.

Conclusion

The Fare Basis hyphen error is one of the simplest Amadeus errors to resolve, but it can waste a lot of time if you do not know where to look. The Fare Basis field in the TST accepts only letters, numbers, and spaces — nothing else. If a hyphen, slash, or asterisk has slipped in, replace it with a space and retry issuance. Keep the field within the 15-character limit, and if you need a refresher on editing the TST, refer to HE TTI. Checking the Fare Basis before issuing tickets takes seconds and prevents the error entirely.

🏷 Tags: amadeus Amadeus errors