automaticvalidationcode
nounUK /ˌɔːtəˈmætɪk ˌvælɪˈdeɪʃən kəʊd/
US /ˌɔːtəˈmætɪk ˌvælɪˈdeɪʃən koʊd/
A special code that checks things by itself to make sure they are right.
The website uses automatic validation code to make sure your email address is correct.
OTHER MEANINGS
2. A program that automatically tests whether data or input follows the required rules.
The automatic validation code rejected the form because the phone number was too short.
3. A built-in feature that confirms a process worked correctly without a person checking it.
After the payment, the automatic validation code confirmed the transaction was successful.
4. A security code generated and checked by a machine to prove something is genuine.
The ticket's automatic validation code proved it was real at the gate.