The easiest way to get started would be to get them to forward you the email.  You can use the link to register the account then update the details during the set up journey.  

If you’ve received an email in error you can complete the details at the bottom of the landing page to give us the right contact information.  

If you have no idea who received the email or if the person has left the company please let us know your details by writing to procurementassistance@tradeshift.com.