Electronic document processing with Transcepta

In support of our sustainability initiatives, we have partnered with Transcepta to enable electronic document processing with our suppliers. This process allows us to electronically transmit purchase orders and change orders to you. It also allows us to receive order acknowledgements and invoices from you. Not only does this reduce paper, postage and data entry costs but also gives you access to orders, invoices and payment status – right at your fingertips!

Click here to start the simple registration process. Please note this is only available for current suppliers. If you are not a current supplier, please go to the PowerAdvocate section below.

If you have any questions for the Alliant Energy team, please check out these frequently asked questions or email

PowerAdvocate: Bid events and Tier II reporting

We have a focus on competitive costs, and suppliers can play a key role in helping us in this area. We are also very interested in working with diverse suppliers so that our business reflects the diversity of the communities we serve.

If you are a current supplier, or are interested in becoming an Alliant Energy supplier, please create a supplier profile in the Alliant Energy Supplier Registration Tool and click 'Registration' in the top right corner. Once you've finished, you should have an active account and can log in to your new account in the Alliant Energy Supplier Tool.

The following steps are required for the registration process:
  1. Go to the Alliant Energy Supplier Registration Tool to create a personal account and a company profile.
  2. We request basic contact and company information, but you also have the option to include products and services your company provides on the “Products and Services” tab. This will help Alliant Energy identify suppliers for the category being sourced.
  3. If you are a current supplier and required to submit Tier II information, you must complete the Direct and Indirect questionnaires within the Tier II Reporting Quarterly (Alliant Energy) Portal on PowerAdvocate. This Portal should be located under your ‘Portals’ tab. If you do not currently have access to this Portal please email or call 1-857-453-5800 between 8 a.m. and 8 p.m. EST Monday - Friday.
Helpful guides:

For technical questions please email or call 1-857-453-5800 between 8 a.m. and 8 p.m. EST Monday - Friday.

Conduct and ethics

Alliant Energy expects all of its suppliers to adhere to the highest level of conduct and ethics in its dealings with Alliant Energy, and when it is dealing with third parties on behalf of the Company. As such, Alliant Energy expects its suppliers to adhere to the Alliant Energy Code of Conduct.pdf.

Our Code requires that business dealings be fair, honest and objective. In particular, we expect that our suppliers will participate in bid processes and procurement practices in accordance with best practices. Best practices include communicating only with the named Alliant Energy representatives during contract negotiations or bid evaluation, refraining from “back door selling,” and attempts to influence Alliant Energy employees or senior management in order to obtain work.

Alliant Energy may disqualify suppliers who engage in these activities or violate the Alliant Energy Code of Conduct from continuing business with Alliant Energy and from making future bids.

Supplier and contractor safety requirements

We have established a business relationship with ISNetworld to help our company objectively manage contractor safety prequalification requirements.

As a result, the majority of contractors performing physical work for Alliant Energy will be required to become subscribers to ISNetworld. Contractors performing non-physical or what we determine to be low-risk physical contract work will not be required to subscribe.

Learn more about ISNetworld

Recent stories from our blog