Mismatched periods
If the contract says six months but the schedule says two weeks, the real purpose of stay is questioned. Align the period across every document before filing.
C-4 REFUSAL & SUPPLEMENT
C-4 Visa Refusals and Supplement Requests: Three Common Causes
Because the C-4 covers short activities of 90 days or less, preparation can look simple. In practice, supplement requests and refusals are not unusual when the contract, the activity plan and the payment structure do not match. Knowing what the review checks, and aligning your documents in advance, helps you avoid unnecessary requests and delays.
Contact an expert ↗Key points
• The contract period, activity period and travel schedule must match and must not exceed 90 days.
• The activity plan should clearly show where, what and for how many days you will work.
• The amount and payer of the fee, and the inviting organization’s ability to pay, must be supported by documents.
• The activity plan should clearly show where, what and for how many days you will work.
• The amount and payer of the fee, and the inviting organization’s ability to pay, must be supported by documents.
What to prepare and check
- Whether the contract period matches the actual activity and flight schedule
- Whether the activity plan states the place, dates and tasks specifically
- Whether the fee amount, payment method and payer (Korean inviter or overseas sending company) are clear
- Documents showing the inviting organization’s ability to pay, such as business registration and tax records
- Whether the applicant’s experience and qualifications connect to the actual activity
Practical cautions
Vague activity plans
Abstract wording such as “technical support” or “event participation” easily triggers a supplement request. State the place, dates and specific tasks.
Weak proof of pay or funds
If it is unclear who pays how much and how, or whether the inviter can afford it, the review may be delayed or refused.
Frequently asked questions
What should I do if I receive a supplement request?
First check the requested documents and the deadline. Rather than simply adding papers, make sure the new and existing documents are consistent before submitting.
Can I reapply after a refusal?
In many cases you can reapply after addressing the reason. Because the reason is sometimes not explained in detail, review the whole file again rather than resubmitting the same documents.
Can I enter as a tourist (visa-free or C-3), work first and get a C-4 later?
No. Paid activities require the correct status before entry, and working outside your status can lead to penalties for both you and the inviting organization.
Note
This article is general information. Actual requirements and documents may vary by nationality, current status, the law at the time of application and the competent authority's decision.
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