types:
invitation
a request (spoken or written) to participate or be present or take part in something
trick or treat
a request by children on Halloween; they pass from door to door asking for goodies and threatening to play tricks on those who refuse
order
a request for something to be made, supplied, or served
callback,
recall
a request by the manufacturer of a defective product to return the product (as for replacement or repair)
prayer wheel
a cylinder with prayers written on it; each revolution counts as uttering the prayers; used especially by Buddhists in Tibet
invite
a colloquial expression for invitation
adjuration
a solemn and earnest appeal to someone to do something
solicitation
an entreaty addressed to someone of superior status
suit
a petition or appeal made to a person of superior status or rank
collect
a short prayer generally preceding the lesson in the Church of Rome or the Church of England
commination
prayers proclaiming God's anger against sinners; read in the Church of England on Ash Wednesday
deprecation
a prayer to avert or remove some evil or disaster
requiescat
a prayer for the repose of the soul of a dead person
presentment
a document that must be accepted and paid by another person
challenge
questioning a statement and demanding an explanation
short order
an order for food that can be prepared quickly
rosary
a series of devotional prayers recited by Roman Catholics and often counted using a string of beads