card – n. a small piece of thick paper

ritual – n. a kind of ceremony that is performed in the same way

customer – n. someone who buys goods or services from someone else

ice-breaking – adj. something that puts people at ease

stamping – n. the process of pressing a sign onto a paper or letter meaning with a device, meaning it is approved or ready to be sent to someone

seal – n. a piece of lead or other material with an individual design on it, placed on a document to show that it has come from the person who claims to have sent it