When creating an order batch, there are several send methods that define the behavior of orders. The send method (email_and_link, link_multiple_custom_list, or direct_send) is passed as the send_method field on the create order batch payload. Available send methods

Gift – Email Notification

Gift – Links Only

Direct Send

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Gift – Email Notification

Send method: email_and_link Orders will be created as gifts. An email notification (and text message, if phone is specified) will be sent to the recipient of the gift. You will also be able to retrieve the gift link from the individual_gift_link field on the Order object (hence “email and link”). An email must be specified for every recipient. Gift recipients can view their gift, swap for another gift (if swap is not disabled), and accept the gift by entering their address. Send method: link_multiple_custom_list Orders will be created as gifts. No email notification will be sent to the gift recipient. On the Order object, there will be an individual_gift_link field which contains the link to the gift, which you can send to the recipient. Gift recipients can view their gift, swap for another gift (if swap is not disabled), and accept the gift by entering their address.

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Direct Send

Direct Send is limited to approved partners. Contact us if you want to use direct send for your integration.
Send method: direct_send Ship products directly to the given address. For more info, see the documentation page for direct send. The address must be specified in the mailing_address field of the recipient payload, like the example below: 
"recipients": [
  {
    "first_name": "Alena",
    "last_name": "Kenter",
    "email": "alena@ongoody.com",
    "mailing_address": {
      "first_name": "Alena",
      "last_name": "Kenter",
      "address_1": "1 Main St",
      "address_2": "Apt 123",
      "city": "New York",
      "state": "NY",
      "postal_code": "10022",
      "country": "US"
    }
  }
]