What are the difference between beliefern and liefern? I know that both mean to deliver but are they interchangeable?
DS11 White Fierce Dansneaker Women's Capezio Zzwc5xq6Ow
"liefern" requires info on what is being delivered, optionally to whom it gets delivered to.
"beliefern" is the other way round. You must define who gets it, but it's optional to state what gets delivered.
Note Hans Peter's examples and add the example
Capezio DS11 Dansneaker Women's Fierce White Wir liefern Tomaten.
for clarity of the usage.