If you overstay

Overstay penalty 

The validity of a short stay visa is maximum 90 days within a six-month period. Those 90 days may be spread across one or more visits.

When you receive your visa, you will also receive an ‘information sheet’ from the Embassy. It is very important that you familiarise yourself with the information as it explains, how you read your visa sticker.

Misuse and overstay of a visa could mean that you will be prevented from obtaining a new visa for up to 5 years.

• Should you overstay your visa in Denmark or another Schengen country for 1 day - 1 month, you will not be eligible for a new visa for a period of 3 years.
• If you overstay your visa in Denmark or another Schengen country for more than 1 month - or if you are expelled from Denmark - or if you apply for asylum in Denmark or another Schengen country when you are there on tourist or business visa, you will not be eligible for a new visa for a period of 5 years

If you receive a penalty for overstaying, you have the right to appeal the decision.
Read more here