How many stamps will I receive upon re-entry with a multiple entry extension of stay in Thailand?

When you are granted a multiple entry extension of stay in Thailand, you will not receive a 12-month stamp for every re-entry. Instead, you will receive a single stamp that reflects your extension's validity period upon your first entry with the extension after it has been issued. Subsequent entries during the validity of the extension will typically just result in a standard re-entry stamp, not additional extensions.