Send a Creative (Recommended)
Design the postcard once as a creative in your dashboard, then send it by ID. The creative supplies the front design, the message, the handwriting, and the background, so the request only needs your audience.1
Find the Creative
List your complete 4x6 postcard creatives and note the
id of the one you want to send. You can also copy the ID from the creative’s card menu (Copy creative ID) in the dashboard.See List Creatives for more info.2
Send the Creative
Pass the ID as
creative_id with your recipients, as a number. Replace 501 below with the ID from the previous step.qrcode_url. For a 6x9 or 6x11 creative, list with mailer_type=postcard6x9 or postcard6x11 and send with the matching size (6x9 or 6x11); when you leave size out, the send uses your account’s default postcard size. See Send a Creative for the full rules.