What should I expect during the investigation for my Thai wife extension?

The user received a stamp indicating their Thai wife visa extension is under investigation and is seeking advice on what to expect. Comments suggest that an immigration officer may visit for a house inspection, possibly reaching out via phone prior to the visit. Experiences shared indicate that these inspections are generally friendly, requiring minimal interaction, and often include asking neighbors about the living situation. Users reassure the original poster that the process is mostly formal and should not be a cause for concern.