We need to produce an original article for the keyword "Turkish Airlines Check In Online". Use only safe HTML tags: h2, h3, p, ul, ol, li, strong, em. No markdown fences. Must be 600-900 words. Use natural headings. Avoid unsupported claims. Should not mention AI generation. Provide factual info about Turkish Airlines online check-in process, requirements, benefits, steps, tips, mobile app, airport kiosks, baggage, etc. We need to ensure word count 600-900. Let's aim around 750 words. We need to use only those tags. So we can have

for main sections,

for subsections,

paragraphs,

  • for lists, for bold, for italics. No other tags like , , maybe? Not listed. The instruction says only safe HTML using h2, h3, p, ul, ol, li, strong, and em tags. So we cannot use tags, cannot use , cannot use , etc. Must stick to those. So we need to produce article with only those tags. No other tags. We must avoid unsupported claims: So we need to be factual. We can mention that Turkish Airlines offers online check-in via website or mobile app, opens 24 hours before departure and closes 1 hour before for domestic, 90 minutes for international, etc. Must verify typical policy: Actually Turkish Airlines online check-in opens 24 hours before flight and closes 1 hour before departure for domestic flights, and 90 minutes before for international flights. Also they allow seat selection, boarding pass download/print, etc. Also mention that you need passport, booking reference, etc. Also mention that you can add baggage, special services. Also mention that if you have only carry-on, you can go directly to security; if you have checked baggage, you need to drop at bag drop counter. Also mention that you can use mobile boarding pass. Also mention that you need to have a valid e-ticket. Also mention that you can check-in for up to 9 passengers. Also mention that you can do it via the Turkish Airlines website or mobile app (iOS/Android). Also mention that you need to have internet connection. Also mention that you can retrieve booking via PNR and last name. Also mention that you cannot check-in online for certain flights (codeshare, some special fares, infants without seat, etc). Also mention that you can also use self-service kiosks at airport. We need to avoid unsupported claims: So we should not claim things like "fastest" or "best". Just describe. We need to produce 600-900 words. Let's count approximate. We'll write about 750 words. We need to ensure we only use allowed tags. Let's structure:

    Turkish Airlines Online Check‑In Overview

    ...

    When Can You Check‑In Online?

    ...

    How to Check‑In on the Website

      maybe? But ol is allowed. Use
      1. steps.

        How to Check‑In via the Mobile App

          ...

          What You Need Before Starting

            ...

            After Completing Online Check‑In

            ...

            Tips for a Smooth Experience

              ...

              Limitations and Exceptions

                ... We need to ensure we don't use any other tags like , ,. Only those allowed. We must not use markdown fences. So plain HTML. Now produce article. Word count: Let's approximate. We'll write fairly detailed. We need to be careful to not exceed tags. Use for emphasis, for italics. Let's draft. We'll count words roughly. We'll write about 750 words. Let's draft:

                Turkish Airlines Online Check‑In Overview