How to Fill Out a Form Someone Sent as a Photo
A photo of a form is not a form. Here is the shortest route from a picture sitting in your messages to something you can type on and send back.
Someone has photographed a piece of paper and sent it to you, and now you are expected to fill it in and return it. The picture itself is not something you can type on, so the first job is turning it into a page. After that the rest is ordinary.
Ask first
Before anything else, reply and ask for the original. A surprising proportion of the time the sender has a proper PDF sitting in their downloads and photographed a printout because it was quicker for them in the moment. Thirty seconds of asking saves you the entire exercise, and a real file is easier for both of you afterwards.
If the original genuinely does not exist — the form came on paper, or from an office that only ever prints — then carry on.
Turn it into a page
Your phone already does this. On an iPhone, open Notes, start a note, tap the camera icon and choose Scan Documents. On Android, the plus button in Google Drive has a Scan option, and most manufacturers ship something equivalent in their files app. Both flatten the perspective, crop to the edges of the paper and give you a PDF rather than a photograph.
Use the scanner on the paper itself if you can get at it, rather than on the photo you were sent. A scan taken straight on in even light is worth more than any amount of correcting afterwards. If the photo is all you have, most scanner apps will import an existing image and still square it up.
Check two things before moving on. The whole form is in frame, including anything at the very bottom edge. And the page is the right way up, because a sideways scan is awkward to work on and easy to forget about until you have already sent it.
Place your answers
Now it behaves like any other flat scan: no fields, no text layer, and placing text on top is the way through. Work at full zoom and match the size of the printed text rather than accepting whatever the editor starts you at.
Put each answer down as its own short piece of text rather than one long block, so you can nudge them into place independently. Dates and signatures usually sit at the bottom and usually matter most, so do those last and look at them at full size before you finish.
What it will not do
The text you add sits on top of an image. It is not searchable, it cannot be pulled out as data, and the file will be larger than a real PDF of the same document because every page is a photograph rather than a set of instructions for drawing letters.
For a form a person reads, none of that matters. For anything that feeds a system — a claim processed automatically, a document entering a records system, a return that gets machine-read — expect it to bounce, and ask for the proper form rather than sending a picture and hoping.
Practical notes
Keep the clean scan and the filled copy as separate files. You will be asked to redo something eventually, and going back to a clean scan is far faster than unpicking edits. Name them so you can tell them apart at a glance, too — the filename is the first thing the recipient sees, and one called scan-final-2 does not inspire confidence.
actuallyfreepdfeditor.com takes the PDF your scanner app produced and lets you place text and a signature anywhere on it, then download the finished file. It opens PDFs rather than images, which is why the scanning step above is the part that has to happen first.