Mourning Postcard - Mourning Maximum Card ?

Everyone is talking about the recently issued "Pahang Heritage" stamp with black borders and seeing the design of the issue rather unusual as postage stamps with black borders are normally regarded as Mourning Stamps. There are mourning stamps, are there mourning postcards (with black borders) ? Yes, there are mourning postcards, BUT there do NOT necessary come with black borders. I have seen many postcards with black borders around, BUT they are NOT mourning postcards. If there are mourning postcards, then, there will be mourning maximum cards - yet to see one ! Above is a maximum card with thick black borders, it is NOT a mourning postcard.

• A maximum card realised with "royal barge" stamp, CDS Cancel @ Bangkok