Do I need to register with Lamphun immigration and report my 90-day stay after moving?

The post inquires whether a retiree moving from Samut Prakan to Lamphun needs to register with local immigration and how to handle their upcoming 90-day report. Community comments confirm that registration is required upon moving, including filing a TM30 and possibly a TM28 for change of address. Some users mention that not all immigration offices request a TM30, and that 90-day reports can sometimes be done online or by post, although this may vary by office.