A passport is shown on screen when Veneno returns to the Dominican Republic, but it is a modern passport with the numbers perforated through each page. This feature would not appear on passports until decades later.
CIVIL COURT is misspelled as "CIVIL CORT" on the eviction papers. Also, the documents are in both English and Spanish, which would not have been the case in the 1960s. In addition, the date 20/12/2016 is visible at the top of the document, as is the filename Notificacion.jpg.
The "Dominicana" airplane shown landing in 1969 features a livery design from the late 70s.
In the extra scene before the closing credits, Relámpago Hernández talks about "tomorrow Sunday". Although the TV show was broadcast on Saturdays, it was actually taped on Thursdays.