According to a press release dated 29 May 2020, El Banco Central de la República Dominicana introduced a new 500-peso dominicano note (B730a) on 1 June 2020. These notes are like the preceding issues, but with the new bank logo (stylized bank headquarters) at upper right front in green-to-gold OVI.
Notes with prefix FF appear to be printed on a different substrate than notes with prefix FC, although both are dated 2016 with the same signatures. Clearly the notes are not polymer, but may be composite substrate or varnished paper. If you have any 2016-dated 50-peso dominicano notes, please compare
The Dominican Republic chapter of The Banknote Book is now available for individual sale and as a free download to subscribers. It’s also available in print from Lulu. This 54-page catalog covers notes issued by the Banco Central de la República Dominicana (Central Bank of the Dominican Republic) from 1947