Create and manage letter orders.

Letter Response

Name	Type	Description
id	string	A unique ID prefixed with `letter_`
object	string	Always `letter`
status	string	See Tracking
imbStatus	string or null	See Intelligent-Mail Tracking
live	boolean	`true` if this is a live mode letter else `false`
description	string or null	Optional line describing this letter
sendDate	Date	Date when the letter will be sent
to	Contact	The recipient of this letter
from	Contact	The sender of this letter
html	string or null	The raw html provided for this letter, if any
template	string or null	A Template ID, if any
uploadedPDF	string or null	A signed link to the original PDF uploaded for this letter, if any
addressPlacement	string	One of `top_first_page` or `insert_blank_page`
color	boolean	Whether the letter will be printed in color
doubleSided	boolean	Whether the letter will be printed double-sided
envelopeType	string	One of `standard_double_window` or `flat`
url	string or null	Signed link to a preview of this letter order
pageCount	number or null	Number of pages produced for this letter
mailingClass	`first_class` or `standard_class`	Defaults to `first_class`. See mailing class
mergeVariables	object or null	See merge variables
metadata	object or null	See metadata