Plegometer : plego METER (ple gomâ e ter) n. An instrument for measuring and recording the force of blows 13. Speedometer : speedo METER (spe domâ et er) n.
Best Answer: A certified letter is sent by a person or a business when they want to mail important information and be sure that it was received. It's not usually a good thing. Collection agencies send them, people involved in legal cases send them, etc... If you won a sweepstakes you would get them.
If you have no need to insure the contents of a letter but you require proof of delivery, including a signature of the person who accepts delivery, certified mail is the service you require. Place the letter or document that you intend to send into a suitable mailer.