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@@ -369,7 +369,8 @@ vouchers at posting time (`attachment_ids`) or afterwards via
rows, and `attachment.unlink` removes one (an unlinked attachment returns
to the inbox). One attachment may be linked to several vouchers (the link
key is the voucher/attachment pair); linking the same pair twice is a
-`CONFLICT`.
+`CONFLICT`. `attachment.list` with `voucher_id` returns every attachment
+linked to that voucher and each item carries that `voucher_id`.
### 7.6 Reports