Missing attachments are one of the most common causes of instant rejection — and one of the most preventable. Whatever the program asks for, provide it: letters of support, financial statements, quotes, articles of incorporation, project plans.
Build a checklist from the application instructions (not the program description — the instructions, usually near the end of the guide). List every required document. Check each one off as you attach it. Then have someone other than the writer verify the package is complete against the list.
Federal applications through portals like Grants.gov or GCOS have rigid rules — wrong file formats, exceeded character limits, or a missing form can all trigger administrative rejection regardless of how good the content is.
The takeaway: a complete package is table stakes. Build a document checklist, tick it off, and have a second person confirm nothing's missing.