I want to extend my 15 days visa on arrival (India) but Indians are only allowed to extend by 7 days, so would it be considered as a visa extension or would it be an extension denial stamp on my passport?
TLDR : Answer Summary
As an Indian citizen, your 15-day visa on arrival in Thailand can only be extended by 7 days. However, if you apply for this extension and are denied, you will receive a stamp in your passport indicating the denial, requiring you to leave the country within those 7 days.