IOH chief executive Peter Ducker FIH said: "We believe that CTH has the resources and knowledge to offer our centres and learners a first-class service and support, and it is for this reason that we are relinquishing our Awarding Body recognition.
“We will, however, still be involved and have oversight of our qualifications’ progress and the Institute of Hospitality brand as members of CTH’s Academic Board.
"We continue to be committed to our mission to promote professionalism in hospitality management through lifelong learning.
“We believe that this is best achieved through partnering with CTH and drawing on the expertise and industry knowledge of our members and fellows to help us have an input into the design and creation of new qualifications to meet the needs of our fast-moving industry."
Established in 1982, CTH is an Ofqual-regulated awarding organisation with a focus on the training needs of new workers to the hospitality, travel, tourism and culinary sectors
It has a network of Approved Teaching Centres worldwide and delivers thousands of qualifications to new students each year.
Simon Cleaver, director of membership, CTH, said: “Whilst the Institute of Hospitality is the professional membership body for the hospitality industry, CTH is the dedicated qualifications body.
“At CTH, we live and breathe qualifications, just that, nothing else.”
"The great thing about our new partnership is that it frees the Institute up to concentrate on its wider membership and career development roles, whilst also securing access to a stream of new potential members from CTH’s global student reach.
“And for CTH, it provides both access to the Institute's unparalleled industry expertise for new qualification development and a great professional membership pathway for graduating students.”
The partnership between the two organisations was agreed last week and became effective from February 2.