Incorrect or incomplete documentation can delay support, create confusion, or affect how a request is handled. Altered documentation is much more serious and should never be used.
If a document is missing a detail or appears inconsistent, the right move is to ask for clarification or correction. The wrong move is to change the document yourself or rely on a version that does not match the official record.
When in doubt, always go back to the issuing or support route and request a corrected document rather than trying to solve the issue informally.