OTTAWA - There was absolutely nothing Ho Ho Ho about the letters Rosalyn Da Costa's children got from Santa on Thursday.

In fact, they included filthy messages.

They are two of 10 inappropriate letters dropped into mailboxes across Ottawa in the last two days and there could be more. On Thursday, Canada Post shut down it's Write To Santa program across the city while it joins Ottawa Police to hunt down the rogue elf...

Da Costa was ... thrilled to see Santa had answered letters from two-year-old Maya and 10-year-old Colton...

"I told Maya: 'There's a letter from Santa just for you, let's read it'. We sat down on the couch, I opened the letter and began to read. My mouth dropped open. Oh, My God!"

Each Santa letter Canada Post delivers contains the same main message with a hand-written personal PS.

Maya's personal PS said: "This letter is too long, you dumb shit."

"I went straight to Google, got the Canada Post number and called," said Da Costa. "A very nice lady at a call centre in Fredericton, N.B. was shocked and when I told her I also had a letter for Colton and was planning to let him read it when he got home, she said I should open it now just in case."

Da Costa went downstairs, picked up the letter and returned to the phone.

What she read had both ladies gasping. "Oh! My God, Oh! My God," they kept repeating.

The personal PS to Colton's letter read: "Your mom s**** d**** and your Dad is gay."

This brought a Canada Post supervisor to the phone.

"My warning to everyone is: 'Open your childrens' letters first'," said Da Costa.

That will not be necessary for a few days in Ottawa because Canada Post has put out an alert for letter carriers to not deliver any Santa letters, to intercept any others in the system and to send them back. "We will check every one," said Canada Post's Daoust.

"And we will make sure we have enough volunteers to send out new messages from Santa," said a Canada Post spokesperson.