Should you require a visa extension you can do so at the Cambodian National Police Immigration Department, Ministry of Interior.
No. 332, Russian Boulevard, Opposite of the Phnom Penh International Airport, Phnom Penh, Cambodia.
Tel: (+855) 12 581 558
+ e-Visa certificate (e-Visa holder)
+ applicant’s passport
+ 2 photographs (size 4x6)
+ appropriate visa fee
Note that the processing time will be up to 2 business days so plan accordingly for your eVisa extension.