Though both retain parameters are optional, we strongly recommend
using them. Doing so will record additional
metadata on your stored certificate which is often of use down the road.
Any text that may help you identify the lead associated with the certificate such as a unique lead identifier or URL pointing to the lead in another system. This value will be displayed in your copy of the certificate for your future reference
"1128238382829"
When retaining a certificate, you can optionally pass the vendor name. This is intended for tracking the name of the company that provided the lead associated with the certificate. TrustedForm will record this value on the certificate stored in your account. Other accounts cannot see this value. When you use TrustedForm reporting, you can easily filter or group by vendor.
"Acme Co."