What does "due diligence" mean?

Appropriate, required, reasonable care or carefulness.

What is a synonym for "due diligence"?

Common synonyms include: circumspection, legal standard, legwork, searching.

Pronounced //ˈdu ˌdɪl.ɪ.d͡ʒəns//.

/ˈdu ˌdɪl.ɪ.d͡ʒəns/ noun

noun ·Rare ·Advanced level

Noun

1
Appropriate, required, reasonable care or carefulness. uncountable
"Consumers are required to use their credit cards with due diligence, which includes making sure that strangers cannot find or see their PIN."
2
A process during which a potential party to a contract evaluates the assets and liabilities of one or more other potential parties, to assess whether it should enter into the contract. uncountable

"Consumers are required to use their credit cards with due diligence, which includes making sure that strangers cannot find or see their PIN."