Should I call the immigration office before picking up my visa extension on Friday?

Okay, and time to close. The Immigration law is used Nation wide,

Sorry, not every office has their own rules, some are more lenient than others with the rules and some have to find a way that works for every body. I just look in another way, like half full or half empty glass.

In Jomtien where lots of elderly people living the system is that the final signature for the "retirement" extension gets done during the day, so you pick up your passport the next day. In other offices where it is not that busy, they do it directly.

Based on marriage goes under consideration for 30 days, you pick up the stamps on the last day mentioned in that stamp.