Advice for those presenting bills/notes to Thai Consulates and Laos Immigration abroad in Vientiane and Saigon (Ho Chi Minh) for payment of visas: make sure your $USD are crisp and clean. I've had both experiences from Laos (Friendship Bridge in Laos) and the Thai Consulate in Saigon (HCM City) who wanted crisp and clean (no cuts or rips ) on the $USD currency.
TLDR : Answer Summary
When presenting U.S. dollars for visa fees at Thai Consulates and Laos Immigration offices in Vientiane and Ho Chi Minh City, ensure that your notes are in crisp and clean condition. Damaged bills, such as those with cuts or rips, may be rejected. This has been a consistent requirement observed by users at both the Friendship Bridge in Laos and the Thai Consulate in Saigon.