In Jainism, the principal prayer to seek forgiveness is the simple but powerful phrase “Michchhāmi dukkaḍaṃ” or more commonly “Michhāmi dukkaḍaṃ kshamā karotu.” In practice, people say:

• Michchhāmi dukkaḍaṃ kshamā karotu

Meaning: I seek forgiveness for any harm I may have caused by body, speech, or mind, knowingly or unknowingly, to all beings.

Other related guidance:

• Kshamā (forgiveness) is often asked at the end of rites with a broader confession: acknowledging any misdeeds and requesting pardon from all beings.
• Before saying the forgiveness phrase, it is customary to reflect quietly on any hurt one may have caused and to feel sincere remorse, with a commitment to be careful in the future.
• In Jain practice, forgiving others first is encouraged; then you seek forgiveness from others by saying the line above to those you know and to all beings.

If you’d like, I can provide the exact Sanskrit/Prakrit wording used in the Digambar and Shwetambar traditions, or give you a short, step-by-step Kshamavani practice you can perform today.