In Jain Dharma, misa-vāda / mithyā-vāda means speaking what is false. But karma is also judged by intention, care, and awareness.

If you did not know it was false, had no suspicious signs, and did not intend to deceive, then the fault is much lighter than when someone knowingly spreads a lie. In such a case, it is more a matter of inadvertent error than deliberate misavāda.

Still, from the Jain point of view, one should cultivate satya and pramāda-tyāga:

• speak only after checking carefully,
• avoid repeating unverified words,
• say “I am not sure” when certainty is lacking,
• do not spread information quickly,
• and correct the mistake once known.

So the answer is:

• If there was no knowledge and no deceitful intention, it is not the same as intentional misavāda.
• But it is still a breach of careful speech if one forwarded it without sufficient verification.
• The fault depends on awareness, intent, and negligence.

To avoid this in Jain practice:

1. Verify before speaking.
2. Prefer silence when unsure.
3. Do not repeat doubtful information.
4. Correct false statements immediately once discovered.
5. Repent inwardly and do pratikramaṇa for the mistake.

In short: it is not the same as deliberate lying, but Jain ethics still ask for greater vigilance in speech.