Vow Renewal Ceremonies can be done for a variety of reasons.
There are no specific legal requirements for a Renewal Ceremony, although I do provide the happily renewing couple with a Renewal Certificate at the end of the Ceremony.
Perhaps it is a Wedding Anniversary and you wish to celebrate with family and friends, and also recommit to each other your ongoing vows to each other.
Some Multicultural Traditions, beliefs and values are able to be incorporated into the Renewal Ceremony, making it special and unique for you.
Wendy