Site: USPSWe're sorry, an unexpected error has occured Add new comment Comments Trying to do customs form for Express to Latvia. Will not print customs form. Have tried 3 time over last 2 days. Why the error? reply Add new comment Your name * E-mail * The content of this field is kept private and will not be shown publicly. Comment * Notify me when new comments are posted iUc6kB Enter the code above * Enter the code without spaces.