Confirm
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→Interaction with the verify URL
Applications are free to re-query the verifyURL field as often as they see fit; whether this is a one-time or an every-time interaction, or something in between, is up to the application implementor to decide.
The verify URL will always return 200 for a successful check. Other possible response codes are 500 (server error) or a 503 (server busy). In the case of a 503, the client should retry at a later date. Clients should not assume that a 503 is a sign that the receipt is invalid.
== References ==
