Can I extend my marriage visa in Thailand for another 3 months without issues?

The user is inquiring about renewing their marriage visa in Thailand, which is valid for 3 months. They want to know if they can simply go to immigration for a new stamp or if there are additional requirements such as proof of funds in their bank account. Comments indicate that standard procedure does not allow for a 3-month extension; typically, extensions can only be done yearly, requiring proof of 400,000 baht in a bank account for at least 2 months prior to application. Alternatively, a 60-day extension might be possible by visiting family, without the financial documentation.