Old $1, $5, $10, $20, $50 bills
The Central bank will continue to exchange these notes indefinitely after January 1, 2022. You take in your old ones and they will give you a new note of the same value.
Link 1 - https://www.central-bank.org.tt/sites/default/files/latest-news/transition-to-polymer-poster-notice.pdf
Link 3 - https://www.facebook.com/photo/?fbid=10159995926989521&set=a.10150218346274521
Old $100 bills
https://newsday.co.tt/2019/12/24/central-bank-to-take-old-100-bills-till-march/
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