Multi-page contracts introduce challenges single-page scans don't — consistency across pages and correct page order both matter as much as any individual scan's quality.
Keep lighting and angle consistent
Scanning all pages in the same spot with the same lighting avoids a document where some pages look noticeably different from others — a small thing, but it matters for a document meant to look professionally uniform.
Scan in order, and check it stayed in order
Capturing pages sequentially and confirming the final merged document preserves that order avoids the tedious problem of a contract that reads out of sequence after export.
Don't forget signature pages and exhibits
Attachments, exhibits, and separately-signed addendum pages are easy to miss when scanning a physical stack — a quick page count check against the physical document before finishing catches this before the document is shared.
Is it fine to scan a signed contract on a phone instead of a proper scanner?
For most everyday purposes, yes — a clean, well-lit, properly dewarped phone scan is generally accepted for personal records and most informal sharing; check specific requirements only for particularly formal legal filings.