Supplier portal: fixing link and submission problems

Last updated: 18 August 2026

Supplier Portal Supply Chain

The supplier portal is a secure web page where you answer a data request from one of your customers — typically questions about your business activities, energy use, or emissions, sometimes with supporting documents attached. You received a link because a company you supply uses NetNada to measure the carbon footprint of its supply chain, and your information helps them complete that picture.

You don't need a NetNada account, a password, or any software to respond. Your emailed link is your key: it identifies you, opens your form, and keeps your answers private between you and the company that sent the request. This article covers the most common problems suppliers run into and how to fix each one.

In this article, you'll learn how to:

Get back in when your link has expired or stopped working
Continue after your session times out for security
Fix files that are rejected for size or type
Understand the difference between saving a draft and submitting

Keep the original email that contained your link. Almost every problem in this article is solved by re-opening the link from that email, so don't delete it until you've submitted your response.

Fix an expired or cancelled link

Links are valid for a limited time as a security measure. If yours has expired, or the request was cancelled and reissued by the sender, you have two options:

Request a fresh link yourself

When an expired link takes you to an error page, look for the option to request a fresh link. Enter the email address the original invitation was sent to, and if there's an open form waiting on you, a new link arrives in your inbox within a few minutes.

Ask the sender to reissue it

If no new link arrives, contact the person at the company who sent the original request and ask them to issue a new one. They can do this from their side in a few clicks.

Open the newest link

Always use the most recent email. Once a new link is issued, older links stop working — so if a link fails, check your inbox for a fresher one first.

The fresh-link request only works with the exact email address the invitation was sent to. If your request seems to go nowhere, check whether the original email arrived at a shared or colleague's inbox and use that address instead.

Get back in after a session timeout

If you leave the portal open for a long time, your session times out for security and the page tells you it can't be verified. This is normal and your saved answers are not lost. Simply re-open the link from your original email and you'll be back where you left off.

If you see a message about too many attempts, the portal has temporarily paused access as a security limit. Wait a few minutes, then open the link from your email again — no other action is needed.

Fix a rejected file upload

Some questions ask you to attach supporting documents, such as invoices or certificates. If a file is rejected, work through these checks:

Check the file size

Files must be under 50 MB, and some questions set a lower limit. Compress large PDFs, export images at a lower resolution, or split a large document into smaller parts and upload each one.

Check the file type

Each question accepts specific formats — typically PDFs, spreadsheets, or common document types. If your file is rejected, convert it to PDF and try again.

Retry a failed upload

If the upload starts but doesn't complete, it's usually a temporary connection issue. Try again, and if it keeps failing, contact the company that sent the form.

Saving drafts vs submitting

The portal saves your answers as a draft automatically while you work, so you can close the page and come back later without losing progress. A saved draft is private — the requesting company can't see your answers until you submit.

Submitting is different: it sends your response to the requesting company and locks the form. Each request accepts one submission, so review your answers before you click Submit.

Gather your documents before you start, save as you go, and only submit when everything is complete. There's no time pressure within your link's validity window — drafts wait for you.

FAQ

I already submitted — can I change my answers?

Not directly. Submissions are one-time, so the form locks once sent. Contact the company that requested the data and ask them to issue a new request — you can then submit an updated response.

Do I need to create a NetNada account to respond?

No. Your emailed link is all you need. The portal is designed so suppliers can respond without accounts, passwords, or software installs.

Can I forward my link to a colleague to fill in?

The link opens for whoever holds it, so treat it like a signed document — only share it with someone you trust to answer on your company's behalf. If a different person should own the response, it's cleaner to ask the sender to reissue the request to their email address.

What happens to the information I submit?

Your answers go only to the company that sent the request. They use the data to calculate the emissions associated with what they buy from you, usually as part of a formal climate report.

The page says the request isn't open — what does that mean?

The company that sent the request has closed or paused it, so the form isn't accepting input right now. Contact them to ask whether they'll reopen it or send a new request.

Who do I contact if nothing here fixes my problem?

Always start with the company that sent you the request — they issued your link and can reissue, reopen, or amend it. They can escalate to NetNada support on your behalf if needed.

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