Glossary entry (derived from question below)
Portuguese term
Brazil
Finance/Crypto/Legal • 14yr exp.
Native in: Portuguese (Variant: Brazilian) 
Works in: English to Portuguese, Spanish to Portuguese, French to Portuguese
prevenido
| 3 +2 | saved |
Clauwolf
|
| 4 | forestalled |
Vitor de Araújo
|
| 4 | prevented |
Mario Freitas
|
| 4 | averted or avoided |
Myriam Seers
|
| cautious |
José Patrício
|
Sep 12, 2022 16:20: Clauwolf Created KOG entry
Non-PRO (1): philgoddard
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Proposed translations
saved
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Note added at 1 hr (2022-09-09 17:21:41 GMT)
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"were saved"
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Note added at 1 hr (2022-09-09 17:47:43 GMT)
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estranho o "prevenidos", deveria ser "poupados"
| Obrigado, Claus. Estranho, mesmo, mas é o que temos. |
| agree |
philgoddard
: Prevented is fine, too.
6 hrs
|
|
thanks
|
|
| agree |
Teresa Freixinho
: No contexto é uma excelente opção.
20 hrs
|
|
obrigado
|
Brazil
Translator. Trans-leitor.
Native in: Portuguese (Variants: Brazilian, European/Portugal)
Works in: English to Portuguese, Spanish to Portuguese, Portuguese to English
forestalled
The company executives forestalled criticism by inviting union leaders to meet."
— Cambridge Dictionary.
| Obrigado, Vitor. Mas acho que no contexto que eu trouxe o sentido é diferente, é mais uma ideia de dinheiro que deixou de ser gasto. Estou tentando pensar em uma palavra para isso em inglês mas não vem à mente. |
Brazil
32 years engineering/law/contracts
Native in: English (Variant: US) , Portuguese (Variant: Brazilian) 
Works in: English to Portuguese, Portuguese to English
prevented
Canada
Practising commercial lawyer
Native in: English (Variant: Canadian)
Works in: French to English, Italian to English, Portuguese to English, and 1 more.
averted or avoided
A possible translation of the entire sentence:
An estimated R$ 12.3 billion in improper payments was averted, which would have been paid had these benefits remained in place until the last installment.
Reference comments
cautious
https://www.linguee.com.br/ingles-portugues/traducao/warned....
https://www.dictionary.com/browse/cautious#:~:text=definitio...
https://www.dictionary.com/browse/caution
Discussion
A possible translation of the entire sentence:
An estimated R$ 12.3 billion in improper payments was averted, which would have been paid had these benefits remained in place until the last installment.