The technical rider is the document where the artist details what they need on stage. To quote backline, a provider looks in it for the gear list, the input list and the load-in conditions.
What to look for
Instruments and amplification requested with brand and model, quantities, stage positions and monitoring requirements. It also helps to confirm date, venue and load-in and soundcheck times.
How to avoid delays
Send the complete rider from the start, mark which items are essential and which accept an equivalent, and confirm a technical contact for the artist. That way the provider answers with a closed quote instead of a string of questions.