In reply to FesteringSore:
I've devised one which can be mass produced and bought at the same time as Christmas cards. It's based on the pre-printed letters given to soldiers going to the front in the First World War. I'm not certain if the last instruction is strictly nessessary, but I put it in in case
Dear.....(1*)
I/We* hope you have had a good year?
Mine/ours* has been OK/wonderful/good/bad/awful*
The children have done well/badly* at play school/school/uni*
....................................(2*) the dog(s)/cat(*) is/are* now house trained or widdling and crapping on the lounge/bedroom/landing/stair/hall*loors/carpets*
Lots of love/best wishes/yours sincerely*
.........................(3*)
Instructions:-
* delete as appropriate
1*,2*,3* Where appropriate you can add names (use blue ink) to personalise this letter
Important note: Any reference to where you are will be deleted by the censor