First, clarify the rules: TDAC "What can be changed, what cannot be changed"

In the TDAC official guide, the system provides the Update Arrival Card (update) function, but it also clearly states: some core identity information is "not modifiable through the update function"; if these must be changed, the official recommendation is to resubmit a new form, with the system taking the "latest submission" as valid.

A. Scope allowed for updates (official statement)

You can update submitted information (e.g., flight, accommodation, and other travel-related details) via the "Update Arrival Card" before travel.

B. Core fields that cannot be modified through updates (official statement)

The official user guide specifies: Full Name (passport name) / Nationality / Date of Birth cannot be updated; the official FAQ further states: Passport Number is also not within the updatable scope.

C. Conclusion: Only two correction paths

• Updatable fields: Modify and resubmit using the Update Arrival Card.
• Non-updatable fields (name/passport number/nationality/birth date): ==Directly resubmit== (Submit new form), with the system only considering the latest valid submission.

Tip: Retrieving the update entry typically requires the TDAC number + date of birth + nationality (as per system requirements), so be sure to save the TDAC file/QR code received in your email.

1) Error library overview: Quickly locate by "the phenomenon you encounter"

Below is a tool table of the most common issues made as "phenomenon → cause → immediate correction" (you can directly paste it into the AIAIG tool page).

2) Name Spelling (Easiest Pitfall): Use MRZ as the Sole Authority

TDAC name consistency should, in principle, match your passport information (especially the MRZ machine-readable zone). Here's a "zero-dispute" approach:

A. How You Should Fill It Out (General Practice)

• Family Name: Exactly as on the passport information page/MRZ (do not add spaces/symbols).
• Given Name: Fill in the given names from the passport in order (if multiple, present as on the passport), do not use abbreviations.
• Middle Name: If it is part of the given name on the passport, include it in the Given Name (do not split based on feeling).
• Use English for all (official guidelines also specify that all information must be in English).

B. Typical Error Checklist (You Can Self-Check Item by Item)

• Using pinyin as an English name (inconsistent with passport)
• Adding commas/periods/double quotes to the name
• Reversing the name order
• MRZ recognition errors not double-checked (common with 0/O, 1/I)

C. What to Do If You Find a Name Error?

Name is one of the fields explicitly stated as "non-updatable" in the official guidelines: ==directly resubmit a new TDAC==, ensuring the new submission information is correct; the system takes the latest submission as authoritative.

3) Passport Number: Most Common Issues Are "Spaces/Character Confusion/Old Passport"

A. Three High-Frequency Pitfalls

1. Including Spaces or Symbols: Most common when copying and pasting.
2. Character Confusion: O/0, I/1, B/8.
3. Passport Change: Submitted with an old passport number and then got a new passport.

B. Correct Fix Method

• If the passport number is wrong: ==do not attempt to use the update function== (official FAQ stance: passport number cannot be updated), simply refill.
• After refilling, keep the latest version of the TDAC (email/download PDF/screenshot QR code).

C. Tips for Operators/Assistants

If you are helping family or clients fill it out: always have them take a clear photo of the passport information page + MRZ, and have them verify the three items "name/passport number/birthdate" before submission to avoid refilling costs.

4) Date Format and Flight Changes: How to Change, and to What Extent Should You Refill?

A. Date Format Errors: Prioritize Using the "System Selector", Minimize Manual Entry

• Use selection options if available (reduce format mismatches).
• When input is necessary, strictly follow the format indicated on the page (do not invent YYYY/MM/DD or DD-MM-YYYY).
• If errors persist: clear browser cache/use incognito mode/switch browsers (Chrome/Firefox preferred)/change devices (computer preferred).

B. Flight Changes: Usually Can Be "Updated", But There Are Two Bottom Lines

1. If you need to change "updatable fields" (flight, accommodation, itinerary, etc.), use Update Arrival Card.
2. If you find "core identity fields" are also wrong (name/passport number/nationality/birthdate), then ==do not just update==, directly refill.

C. Official Update Process (You Can Directly Write It as a Step Diagram)

• On the official website, select Update Arrival Card
• Enter retrieval information as required (usually includes: TDAC number, date of birth, nationality)
• After finding the record, edit the updatable fields
• Resubmit and download the new TDAC (QR code)

Official FAQ also states: if information cannot be updated (e.g., core identity fields), it is recommended to refill; and multiple submissions are allowed, with the system taking the latest submission as authoritative.