## TL;DR

When SuprSend rejects your trigger with a distinct_id error, you are not passing a user identity SuprSend can resolve. Either include the recipient's distinct_id, or for anonymous users pass their channels directly and set is_transient to True.

## Steps

1. When SuprSend rejects your trigger with a distinct_id error, you are not passing a user identity SuprSend can resolve. Either include the recipient's distinct_id, or for anonymous users pass their channels directly and set is_transient to True. Guessing at a placeholder distinct_id just routes the notification to a phantom user.

## When to use

You are seeing this: Guessing at a placeholder distinct_id just routes the notification to a phantom user. Use this skill when you run into "SuprSend distinct_id error: pass a real user or flag transient".

## When not to use

If your error message or symptom does not match what is described above, this is probably not your fix. Search for your exact error text instead of forcing this one to fit.

## Versions

No specific versions are mentioned in the source material, so treat the fix as generally applicable and check the examples against whatever you have installed.

## Why this happens

The original report does not dig into a root cause. It documents the symptom and the fix that resolved it.