Wa alaykum assalamu warahmatullah,

In the Name of Allah, the All-Merciful, the Mercy-Giving

All praise is due to Allah alone; peace and blessings be upon Our Prophet Muhammad.

There is no penalty in this case, for the farewell tawaf, or tawaf al-wada`, is only recommendable not obligatory. Therefore, if a Muslim forgets or leaves it out either in Hajj or `Umrah, he or she does not have to pay any ransom.

Allah Almighty knows best