Spiritual Retreat: Committing an Unlawful Act of Iʿtikaf Due to Ignorance
Practical Laws of Islam as per the teachings of Ayatullah Sistani
Ruling 1740
If a muʿtakif commits an unlawful act of iʿtikāf on account of not knowing the ruling about this, in the event that he was culpably ignorant (al‑jāhil al‑muqaṣṣir),[1] his iʿtikāf becomes invalid. If he was inculpably ignorant (al‑jāhil al‑qāṣir), his iʿtikāf is valid and it will be ruled to be inadvertence [which as mentioned in the previous ruling, does not invalidate one’s iʿtikāf in any circumstance].
-Ayatullah Sistani, Practical Laws of Islam, Spiritual Retreat (Iʿtikāf)