What should I do if my 90-day O visa doesn't arrive before my flight to Thailand?

The user inquired about the procedure if their 90-day O visa, applied for at the Thai Embassy in Belgium, does not arrive before their flight on February 20. Responses suggested various options: patience as visas typically arrive on time, that Belgian passport holders receive a 60-day visa exempt stamp upon arrival, and the need to leave Thailand and re-enter to activate the 90-day visa once approved. Users recommended contacting the embassy via call if the visa doesn't arrive and noted that while waiting for the visa, the user should also prepare for visa requirements upon re-entry into Thailand.