When making a transfer you put the structured message (otherwise known as the reference number) in the title. Title can take either structured communication format or a normal format (letters/numbers).

 

             https://s3.eu-central-1.amazonaws.com/euc-cdn.freshdesk.com/data/helpdesk/attachments/production/80002315034/original/Transfer_2.png?X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Credential=AKIAS6FNSMY2WD6T3JNC%2F20210121%2Feu-central-1%2Fs3%2Faws4_request&X-Amz-Date=20210121T181138Z&X-Amz-Expires=86400&X-Amz-SignedHeaders=host&X-Amz-Signature=dbabeba076757bac47c709fb675b7ed6c45848d435e0f80558bcce64483526e6                 https://s3.eu-central-1.amazonaws.com/euc-cdn.freshdesk.com/data/helpdesk/attachments/production/80002315035/original/Title.png?X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Credential=AKIAS6FNSMY2WD6T3JNC%2F20210121%2Feu-central-1%2Fs3%2Faws4_request&X-Amz-Date=20210121T181138Z&X-Amz-Expires=86400&X-Amz-SignedHeaders=host&X-Amz-Signature=71728a007bd910a7ded64ae9f3be2682fccd11f60b0cbae23c07e9954a71c896.