To Finland its not about how long ( around 15 days) BUT to have appointment with visa Center , our Embassy recommended to find time , it’s better to start months before.
MJ Praiser I lived in my partners rental bungalow years and quarantee I don’t have any agreement or house book. I have address. My 90 day show up I tell them my address and they never asked anything more . In Koh Samui.
Hardly but how I know. Immigration don’t ( in my knowledge ) ask rental contract, only address. Sure it’s best information if you asked directly from immigration. But rental contract is between owner / agent and who rent the house . So I figured that it can be corrected when both parties accept correction. In your case if I understood correctly, landlord already accepted that you just correct that to the agreement.