Consequences of Overstaying a Visa
Overstaying a visa has the following consequences:

Fines:
500 baht per day for overstaying 1-40 days
2,000 baht per day for overstaying 41-90 days
(Other)

Deportation:
For overstaying 90 days or more, you will be deported and banned from entering Thailand for 1 year.

Blacklisting:
You may be blacklisted and banned from entering Thailand for 5 years.
Remedies

If you have overstayed your visa, you can take the following steps:
•Report to the Immigration Bureau:
You must report to the Immigration Bureau and pay the fine.
If you have overstayed for more than 90 days, you may need to apply for an overstay visa.
•Apply for a New Visa:
You can apply for a new visa of a different type.
Make sure you meet the eligibility requirements.

Precautions
•Overstaying a visa can affect your reputation.
•Overstaying a visa can lead to visa denial in the future.

References:
Immigration Bureau website: https://www.immigration.go.th/

Conclusion
Overstaying a visa can happen to anyone. Understanding Thai laws related to overstaying a visa can help you protect your rights and interests.