After pairing, classic and block checkout collect the server-side cart, product and variant IDs, names, quantities, prices, currency, checkout ID, revision, activity time and entered email address. Signed updates send those facts and a personal recovery link from WordPress to https://api.maildroppa.com/integrations/woocommerce/plugin/checkouts. This is separate from newsletter signup and does not itself subscribe the visitor. Maildroppa applies the account's configured reminder permissions and sending rules; connecting the plugin does not activate a reminder automation. WordPress retains these checkout facts for up to 30 days from the original checkout. Recovery tokens and immutable delivery bodies are encrypted using the shop credential. Delivery attempts are limited to eight attempts and 24 hours. WP-Cron drives delivery and expiry cleanup; missed cron runs delay physical deletion. Before each native reminder, Maildroppa requests the current checkout through the signed WordPress /wp-json/maildroppa/v1/woocommerce/checkouts/state endpoint. A closed, empty, expired or unavailable checkout cannot authorize a reminder. Opening a personal recovery link displays a page without changing the cart. A deliberate form submission restores available items at current prices, and replacing an existing cart requires confirmation. Saved payment, login and billing details are not restored. A changed email address, completed order, expired link or revoked pairing prevents reuse of the old link. Disconnect invalidates access and pending technical work while retaining durable checkout facts under their existing expiry. Product pages can display a purpose-specific availability form for an unavailable simple product or selected variant when enabled in Maildroppa. WordPress requests the signed form configuration and sends the selected product/variant IDs, email address, language and server-observed visitor IP address to /integrations/woocommerce/plugin/back-in-stock/requests. Maildroppa uses its existing confirmation and product-availability notification flow. This does not subscribe the visitor to newsletters. The browser submits to WordPress; this form does not load the remote hosted-form runtime. WordPress personal-data export includes the person's current checkout facts and any matching earlier recipient still present in an outstanding encrypted delivery, without recovery links, tokens or secrets. Explicit erasure removes matching local checkout and delivery copies. A signed, encrypted erasure request between Maildroppa and WordPress binds the source, original credential and request ID. Local completion and outstanding remote completion are distinct. Encrypted confirmation work expires after 24 hours and then requires source-specific manual completion; minimal receipts contain only references, hashes and removal counts.