what can you put in a padded flat rate envelope

Consequences: You'll want to be very careful, detailed, and accurate.If you have a handwritten customs form, you'll need to give it to a retail associate at a USPS location and they'll make a computer-generated customs form for you.

Customs Forms: When you send merchandise (anything that's not correspondence or documents), it must have a customs form that's computer-generated (not handwritten) by approved USPS software that electronically sends the customs form data to U.S.

Things You Can't Send: There are more things you can't send in international packages, and each country has its own rules about what it'll allow in inbound packages.

Rules: There are more rules, laws, and regulations that you must follow (from USPS, the U.S., and the destination country), and you are responsible for following all of them.

Tracking: Depending on how and where you ship, you may not get the same level of tracking information you're used to for U.S.

Sending packages to other countries is different from sending packages inside the U.S.:

What can you put in a padded flat rate envelope