What is the letter asking for?
Most partners want you to send and receive a few standard business documents — usually purchase orders, ship notices, and invoices — in the format they already use. SignalEDI handles that format so your team does not have to.
Where do I paste or upload the letter?
Choose Start free trial to create your workspace. After sign-in, Connect asks about your business and lets you paste or upload the partner requirements. The letter is collected in your workspace, not on this public page.
What does it cost?
SignalEDI publishes flat monthly EDI pricing: Seasonal $99, Starter $199, Growth $999, and Enterprise $1999 per month. There are no standard per-document fees. Finite plans alert you before the included monthly allowance is reached and pause new processing at the allowance until you upgrade; Enterprise is unlimited.