Michhami Dukkadam is a Jain expression of forgiveness. It literally means “may all the wrong I have done be forgiven.” It is a sincere request for pardon from all living beings for any harm caused knowingly or unknowingly, and it is followed by forgiving others in return.

Key points you can keep in mind:

• When to say it: on Samvatsari (the last day of Paryushan) and during Pratikraman, or any time you wish to reconcile with someone.
• What it expresses: humility, self-purification, and a vow to practice ahimsa more carefully.
• Traditions: the essence is the same in both Digambar and Swetambar traditions; wording and local customs may vary slightly.

Simple responses you can use or adapt:

• Michhami Dukkadam. I beg forgiveness for any hurt I may have caused you, knowingly or unknowingly.
• Please forgive me for any fault of thought, word, or deed. Michhami Dukkadam.
• I seek your forgiveness for all my mistakes. Michhami Dukkadam.
• May there be peace and forgiveness for us all. Michhami Dukkadam.

If you’d like a traditional variant from scriptures or a more formal wording, I can share a precise version used in practice.

You can read more here