| Field Name | Type | Required | Description | Example |
| order_po | number | yes | A unique order identifier | 12345 |
| ship_first_name | text | yes | Recipient's first name | John |
| ship_last_name | text | yes | Recipient's last name | Doe |
| ship_company_name | text | no | Recipient's company name | ABC Company |
| ship_address_1 | text | yes | Recipient's street address | 123 Somehwere |
| ship_address_2 | text | no | Additional address information | Suite 12 |
| ship_city | text | yes | Recipient's city or town | Sunshine City |
| ship_state_code | text | see description | Recipient's official two digit state code. Required if shipping within the United States | CA |
| ship_province | text | see description | Recipient's province if outside the United States | |
| ship_zip | text | yes | Recipient's zip or postal code | 12345 |
| ship_phone | text | yes | Phone number of recipient or sender. This is required by USPS and UPS. Use your business phone number if not comfortable in supplying this. This will be the number UPS or USPS will use in the rare occasion they need to call somone about a shipment. | 123456789 |
| ship_country_code | text | yes | Recipient's official two digit country code | us |
| product_qty | number | yes | Number of copies | 1 |
| product_sku | text | yes | Product code found when setting up a print in P.O.S.T., our print ordering app or the sku from virtual inventory. | AP1234P1234 |
| shipping_code | text | yes | See shipping codes below | EC |
| product_image_file_url | text | see description | Url to hi-resolution downloadable image file to be printed. Required if not using product code rather than a sku from virtual inventory. | |
| product_thumb_url | text | see description | Url to preview what will be printed on invoice. Required if not using product code rather than a sku from virtual inventory. | |
| product_cropping | text | see description | Leave blank of use the word "crop" if you want the image to be cropped if it does not fit the size. Use "fit" to not crop. | |