The documents needed for a Cambodia eVisa are simple — a passport scan and a photo. What flags American files is not the documents, it is the scan quality. Here is how to upload both so they clear on the first try.

Lay your US passport flat on a dark surface, light it with daylight from a side window (never the flash), and shoot the bio page from directly above so both edges are in frame and every character of the machine-readable zone is legible. For the photo, use a plain white wall, neutral expression, no glasses, and save it as a JPEG around 600×600 pixels or larger. The documents needed are just the passport scan and the photo — what flags American files is glare, blur, cropped corners, or a filtered image, and every one of those is a free re-upload that keeps the 3-business-day clock running.
The documents needed for a Cambodia eVisa are about as light as travel paperwork gets for US citizens: a scan of your passport bio page and a passport-style photo. That is the part travelers worry about, and it is rarely the part that goes wrong. What actually bounces an American file back to the inbox is scan quality — a blown-out laminate, a soft-focus photo, a corner cropped off the page, a file the size of a small movie. The document is fine. The capture is not.
On the Rejection & Resubmission desk, the same handful of upload problems repeat week after week. They are all avoidable, and none of them need a scanner, a photo studio, or any gear beyond the phone already in your pocket. The trick is knowing exactly what the upload validator looks for before you hit submit, so the file clears on the first pass instead of costing you a day.
This guide is about the upload itself — how to capture a passport scan and a photo that clear the first time, and how to fix the specific things that flag US applicants. It sits inside the wider Cambodia visa for US citizens process, so if you are still confirming which items you actually need, start with the full Cambodia eVisa documents required for Americans, then come back here for the scan-quality detail. When your files are ready, you can apply directly — most Americans finish the upload step inside three minutes.
Cambodian Immigration needs to read every detail on your US passport bio page — full name, passport number, date of birth, issue and expiry dates, and the two lines of the machine-readable zone at the bottom. That is the whole job of the scan: legibility. A phone camera does this better than most home scanners, because you control the angle and the light. You do not need a flatbed.
Put the passport flat on a clean, plain, ideally dark surface. A wooden desk or a dark notebook works well, because contrast makes the page edges sharper for the upload validator to detect. Open it fully so the bio page lies flat with no curl at the spine. Press the page down gently if it lifts. Use daylight coming in from a side window, never the camera flash — the flash bounces straight back off the laminate and washes out the middle of the page where your number and name sit.
Hold the phone directly above the open passport, parallel to the page, at about a foot. Tap the screen to focus on the printed text before you shoot, and wait for it to lock — a half-second of patience here saves a resubmission. Frame both edges of the page with a thumb-width of margin on all four sides. The single most common scan rejection for US applicants is a corner of the bio page cropped out of frame, so give yourself room rather than filling the shot edge to edge.
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The Cambodia e-Arrival Card is a separate step from your eVisa, and a small one — $5 USD verified through us, 14 fields, filed within 7 days before you fly. Here is exactly what that fee covers, why it is not bundled into your visa price, and the timing that keeps you moving at the gate.
柬埔寨电子到达卡共分三个部分,包含14个字段,需在抵达前7天内提交。以下是表格要求填写的每个字段的准确内容及顺序,以及在自助服务亭容易让美国旅客出错的日期格式问题。
柬埔寨电子到达卡要求填写14项信息,分为三个部分——您的身份信息、航班和住宿信息,以及简短的海关申报。以下是每个字段的具体要求,以及开始前需要准备的四样东西。
Before you upload, zoom in on your own capture and read it back: every letter of your name, every digit of the passport number, and the two lines of < character codes at the bottom. If all of that is crisp, you are done. If anything is fuzzy, blown out, or clipped, retake it — it costs you thirty seconds now versus a day later. Most of what lands on our resubmission queue is a scan that looked fine as a thumbnail but fell apart on the machine-readable zone. The wider list of Cambodia eVisa rejection reasons for US citizens shows where scan quality sits among the other common flags.
Most scan flags come down to three things: glare, blur, and framing. Each has a specific fix, and once you know the move, you will not hit it again. These are the patterns we see most often on US passport uploads, in order of how frequently they bounce a file.
A blurry scan rejected at upload is the single most fixable problem in the whole application. None of these require a retake of more than a minute, and none cost a cent. If your first capture is borderline, take three or four and pick the sharpest — phones are free to shoot, and the validator only ever sees the one you choose to upload.
The photo is the other half of the documents needed, and it carries its own upload rules. The Cambodia eVisa wants a recent passport-style headshot against a plain white or off-white background, sized as a 4×6 cm equivalent, face fully visible, head centered, neutral expression — no smile, no glasses, no hats. Most American applicants shoot this on a phone against a white wall, and it clears every time when the file itself is right.
File format and size trip up more US applicants than the pose. Save the photo as a JPEG, ideally 600×600 pixels or larger. Modern iPhones shoot in HEIC by default, which the upload may not accept, so convert to JPEG first — in the Photos app you can export or share it as a JPEG copy. Avoid uploading the raw 12-megapixel original; an oversized file can be refused outright, and you only need a clean square crop of your head and shoulders, not the whole room behind you.
Do not edit, filter, or beautify the image. The auto-checker looks for natural skin texture and rejects heavily smoothed or color-shifted photos, so the portrait mode that flatters you on social media works against you here. A plain, unfiltered, evenly lit headshot is exactly what clears. For the full size, background, and crop specifics, the Cambodia eVisa photo requirements for Americans lay it out field by field, and the photo size and file format guide for Americans covers the pixel and megabyte limits in detail.
A flagged upload is not a rejection of your trip, and it is not a lost fee. It is a request to re-upload a cleaner file, and it is one of the most routine things that happens on an application. You get an email with a clear, specific list of what to redo — usually a fresh photo against a white wall, or a passport scan without glare. There is no extra charge to fix it.
Speed is the only thing that matters once you are flagged. Reply with the corrected file quickly and the 3-business-day clock keeps running rather than resetting from scratch. Free resubmission is part of the all-in price for both the Tourist eVisa at $80 USD and the Business eVisa at $90 USD, so you are not penalized for needing a second go at the upload. Open the email, read the exact reason, fix that one thing using the moves above, and re-upload — most corrected files clear on the next pass.
If you would rather not deal with a flag at all, the simplest insurance is to check your own captures before you submit, against the same list the validator uses. Read your scan back, confirm the photo is a plain unfiltered JPEG, and you sidestep the whole round trip. When you want the requirements as a single tick-box list to run through before you upload, the Cambodia eVisa required documents checklist for US citizens does exactly that.