During times of illness and loss, those who have performed kind acts are thanked with a written acknowledgment.  Informals or conventional social stationery may be used for these notes. However, during the bereavement period, loved ones often prefer to use a preprinted note or card.  A folded piece allows space to write whereas a flat card leave little room for handwritten expression.  In cases in which there is an outpouring of business and acquaintance support flat cards may allow for prompt recognition. Both flat cards and folded notes are valid options depending on the circumstance.