What is the procedure for obtaining a Thai visa if you re-enter the country on a visa-exempt status while waiting for approval?

A user shared that a friend re-entered Thailand on a 60-day visa exemption while awaiting their visa approval from Ho Chi Minh City (HCMC). After entering on 7/12, they received their visa approval on 11/12 and successfully completed a border run on the Thailand-Myanmar border at Ranong. One commenter inquired about the process of getting the visa stamp if the individual was not in HCMC when the visa was approved.