My wife has an Extension until 30 Nov 2018 and a multiple re-entry permit. On returning from Laos yesterday, via Chong Mek, her "admitted until" stamp was left blank, although the departure card was stamped until 30 Nov 2018. Does it matter. She'll be leaving the country again in April.
TLDR : Answer Summary
A user discusses their wife's immigration situation after returning from Laos, where her "admitted until" stamp was left blank despite having a valid extension until November. Community members emphasize the importance of addressing the issue at the immigration office and the potential risks of traveling without a correct stamp.