A student should preserve what was actually heard. Writing core material during the session, marking ambiguous names with vowels or consonantal dots, and collating notes against a reliable original are practical methods of preservation.
Attention to recording and precision is emphasized.
Many chain errors arise from similar names, undotted writing or silently replacing an heard wording with a later recollection. Particular care is needed with unfamiliar transmitters and difficult expressions.
Regular review helps retain wording and sequence. Without it, wording can drift, narrator order can change, or a link in the chain may be omitted.