Invoice Upload Requirements & Guidelines
All invoices must be in a supported format for your selected upload method, with each invoice submitted as a separate file.
Upload via the opsi mobile or web app:
PDF, JPEG/JPG, PNG, HEIC
Upload via your opsi invoice email address:
PDF only
If you’re experiencing upload failures, please ensure:
The file is in a supported format
Each upload contains only a single invoice (one day, one invoice number)
Valid vs. Invalid Documents
Accepted document types include:
Invoices
Credit memos / credit notes
Payment receipts
Sales orders
Not accepted:
Statements
Account summaries
Bank screenshots
Important: If a valid invoice is included in the file, it will still be processed - even if other supporting documents (like packing slips or bills of lading) are attached.
Image Quality
Invoices may fail to process if they are:
Blurry
Too dark
Cut off
Otherwise unreadable
Make sure all text is clearly visible before uploading.
Missing Pages
Invoices may fail to process if pages are missing (e.g., “Page 1 of 4” but not all pages are included).
However, if the invoice includes a visible total and all line items add up correctly, it may still be processed even if page numbering appears incomplete.
Missing Required Details
Invoices must include:
Vendor name
Total amount
Line item amounts
Notes:
Handwritten vendor names on receipt-style forms are acceptable
Information can span across multiple pages as long as it is complete within the file
Multiple Documents in One File
Each file should contain only one invoice.
You may experience issues if:
Multiple invoices (different invoice numbers) are included in the same file
Different document types (e.g., invoice + credit memo) are combined
Allowed exceptions:
Supporting documents (packing slips, bills of lading, delivery receipts)
Multi-page invoices that continue across pages
Best Practices
Upload one invoice per file
Ensure all pages are included
Use clear, high-quality images
Double-check that key details are visible