# MD for: https://www.mercadopago.com.br/developers/en/docs/checkout-pro/additional-settings/term-of-preference.md

\# Configure term of preference Term is the validity period defined for a given payment preference. When defining the term of the preference, you choose a date for it to take effect and the expiration date defining a maximum payment limit. 1\. Send a \*\*POST\*\* with the parameters \`expires\`, \`expiration\_date\_from\` and \`expiration\_date\_to\` to the endpoint \[/checkout/preferences\](https://www.mercadopago.com.br/developers/en/reference/online-payments/checkout-pro/preferences/create-preference/post). 2\. In \`expires\`, enter \`true\`. 3\. In \`expiration\_date\_from\`, enter the effective start date and time. The value must follow the ISO 8601 format: yyyy-MM-dd'T'HH:mm:sszas. 4\. In \`expiration\_date\_to\`, enter the expiration date and time. The value must follow the ISO 8601 format: yyyy-MM-dd'T'HH:mm:sszas 5\. Execute the request and make sure that the data and time matches the example shown below. \`\`\`json "expires": true, "expiration\_date\_from": "2017-02-01T12:00:00.000-04:00", "expiration\_date\_to": "2017-02-28T12:00:00.000-04:00" \`\`\`