Author Fees and Article Processing Charge (APC)

All author fees are currently zero. The journal does not charge authors for submission, editorial handling, peer review, publication or article processing (APC), page length, colour figures, supplementary files, or manuscript withdrawal.

No payment is requested before or after an editorial decision. Rejected manuscripts are never charged. Editorial decisions are based solely on scholarly merit, scope, integrity, and peer review, and are independent of financial considerations.

Waivers: A waiver programme is not required while all author fees are IDR 0. If fees are introduced in the future, the journal will publish the amount, currency, payment stage, waiver criteria, and effective date before they apply. Any future fee will apply prospectively only and will not be imposed on manuscripts submitted before the published effective date.

Withdrawal: No financial penalty is imposed for withdrawal. Authors should provide a written reason and promptly contact the editorial office. Suspected unethical or duplicate submission may be handled under the journal ethics policy, but not through a withdrawal charge.

This policy is effective from 16 September 2026 and remains in force until a revised policy is formally approved and published.

Fraud warning: The journal does not currently request author payments. Any invoice or payment instruction claiming to be from the journal should be treated as suspicious and verified directly with editor.ppc@zatara.id. Do not transfer funds based on messages from any other address.