It is imperative for one who arrives Al Meeqaat to make an intention of entering the ritual of Hajj  and to wear the Ihram garments and take off the sewn clothes. 

If he remains on the sewn garment after Ihraam for no reason, he is sinning, and the fidyah is required, which is slaughtering of a sheep; or feeding six poor people, for each poor person half a ṣaa’; or fasting for three days. He is at free to choose any of the aforementioned. But if he remains on a sewn cloth for a reason, the ransom is required, and there is no sin on him.

Dr. Muhammad Syed Ahmad Al-Masir says: The prohibitions of not being in Ihram do not have any relationship with the validity of Hajj. Hence, if a Muslim performs the rituals in his casual clothes for a reason or for no reason, the Hajj is valid and the obligatory is waived. Allah has however prescribed a compulsory ransom for such an incident, which is the choice of choosing between fasting three days, feeding six poor people or slaughtering a sheep. Almighty Allah says: 

“… And whoever among you is ill or has an ailment of the head [making shaving necessary must offer] a ransom of fasting [three days] or charity or sacrifice…” [Quran 2 : 196 ]