ROYAL Mail bosses are reminding people in Huddersfield to put the correct addresses on all their letters, cards and parcels, to ensure they arrive in time for Christmas.
Almost a quarter of a million letters are sent nationally each week without a proper address on them.
Of these, 55,000 only have the name on the envelope.
Many of the items will end up at the Royal Mail's National Returns Centre in Belfast, where a team of more than 200 staff work to try to return undeliverable parcels and letters to the sender.
Over Christmas the centre usually handles two to three million cards and 21,000 parcels.
Items which have a return address are delivered back to the sender, but parcels that have no sender's details will be kept for six months to give customers a chance to track them down.
A Royal Mail spokesman said: "The majority of mail goes through our automated sorting machines, which speeds up the process.
"However, when letters have an incorrect address, or in some cases no address, they then have to be sorted by hand.
"Some letters which have only a name are very difficult to deliver. We rely on our customers putting correct addresses and postcodes on them to ensure we can deliver them to the right person.
"People should put a return address on the outside of the envelope. Then if there are any problems with delivering the item, we can at least make sure it is returned to the sender."
THIS Saturday, December 17, is the latest posting date for second class to arrive in time for Christmas.
* Tuesday December 20 is the last date for first class mail
* Special delivery items can be sent up to December 22.
* There will be no mail deliveries between December 25 and 27 or on January 1 and 2.
* Normal service will be resumed on January 3.
* For opening hours at post offices over the period, customers should ring the customer helpline, 08457 223344.