# Miscellaneous - [Protecting against password reuse](https://docs.perkville.com/faqs/miscellaneous/protecting-against-password-reuse.md): This article describes how Perkville helps protects against credential stuffing, and what you can do to secure your account - [Is it possible to pre-populate the email address field on the page for joining the loyalty program?](https://docs.perkville.com/faqs/miscellaneous/is-it-possible-to-pre-populate-the-email-address-field-on-the-page-for-joining-the-loyalty-program.md) - [I need to change the support email that displays in the footer. How can I do that?](https://docs.perkville.com/faqs/miscellaneous/i-need-to-change-the-support-email-that-displays-in-the-footer.-how-can-i-do-that.md) - [I would like to reactivate my business' Perkville account.](https://docs.perkville.com/faqs/miscellaneous/i-would-like-to-reactivate-my-business-perkville-account..md) - [How do I control my email notifications?](https://docs.perkville.com/faqs/miscellaneous/how-do-i-control-my-email-notifications.md) - [How do I update my billing information (e.g. credit card on file)?](https://docs.perkville.com/faqs/miscellaneous/how-do-i-update-my-billing-information-e.g.-credit-card-on-file.md) - [How do I edit a customer's birthday?](https://docs.perkville.com/faqs/miscellaneous/how-do-i-edit-a-customers-birthday.md) - [How do I edit a customer's home location?](https://docs.perkville.com/faqs/miscellaneous/how-do-i-edit-a-customers-home-location.md) - [My customer signed up for a new membership, will their points transfer?](https://docs.perkville.com/faqs/miscellaneous/my-customer-signed-up-for-a-new-membership-will-their-points-transfer.md) - [How do I cancel my Perkville subscription?](https://docs.perkville.com/faqs/miscellaneous/how-do-i-cancel-my-perkville-subscription.md) - [How are voided transactions accounted for?](https://docs.perkville.com/faqs/miscellaneous/how-are-voided-transactions-accounted-for.md) - [Where do I find my business ID?](https://docs.perkville.com/faqs/miscellaneous/where-do-i-find-my-business-id.md) --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.perkville.com/faqs/miscellaneous.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.