Receipts are the worst-behaved paper you’ll ever try to scan: thin, curling stock, faded thermal print that gets fainter every week it sits in a wallet, and a habit of arriving in a crumpled stack right before an expense report is due. A quick photo usually isn’t good enough for what a finance system expects.
A casual phone photo captures the receipt at an angle, with background clutter — a desk, a bag, other papers — around the edges, and under whatever lighting happened to be available, shadows and glare included. Some expense systems reject submissions outright if the amount or vendor name isn’t clearly legible, which a photo with any of those problems risks being. Scan to PDF is built for exactly this gap between “photo” and “scan”: it captures the receipt through your phone’s camera, then automatically crops to just the paper’s edges and cleans up the result — no separate scanner needed, no app install.
Three settings decide the result. Use Black & White mode for a faded thermal receipt — this mode pushes for high contrast, which is precisely what a receipt that’s lost half its ink needs, exaggerating the difference between the (weak) printed text and the paper background, often recovering legibility that looks close to unreadable in a normal color photo. Use Grayscale for a receipt with a stamp, logo, or handwritten note you want to keep readable with its natural shading, rather than pushed to stark black and white. And flatten it out first: a curled receipt casts a shadow across itself and distorts the crop, so press it flat under a book for a minute, or hold it against a flat surface while capturing, rather than shooting it as it naturally curls.
Finance departments generally want one PDF per expense report, not fifteen separate attachments. Scan to PDF combines up to 30 captures into a single PDF, one receipt per page, in the order you scan them — capture the whole stack in one session, reorder afterward if a couple ended up out of sequence, and download one file. Sort as you go rather than after: scan receipts in the same order your expense line items will appear, and matching them to the report afterward takes seconds instead of a search.
Before submitting, zoom in on the total and date in the finished PDF — the two fields most expense systems actually check, and the two most likely to be affected if a thermal receipt was already faded before you scanned it. And keep the physical receipt until reimbursement clears, regardless of scan quality — a policy question for your finance team, not a technical one, but worth doing as standard practice.
After scanning: compress the finished PDF if a large batch of receipts produces a bigger file than your expense system accepts, reorder pages if a few receipts ended up out of sequence after scanning the whole stack, lock it with a password if the report includes anything you’d rather not have openly readable in transit, or add page numbers if the report references receipts by position rather than by line item.
Receipts scanned for reimbursement are usually the same receipts you’ll want at tax time — How to Organize Tax Documents Digitally covers filing them so they’re still findable months later. If paper keeps arriving faster than you file it, How to Create a Paperless Home Office is the habit that fixes the backlog rather than the batch.
The free Scan to PDF tool makes this quick — no registration wall, no watermark, files gone right after processing.