Peer pressure uses moral and other linkages between borrowers and project participants to ensure participation and repayment in microcredit programmes. Peers could be other members in a borrowers group (where, unless the initial borrowers in a group repay, the other members do not receive loans. Hence pressure is put on the initial members to repay); community leaders (usually idetified, nurchured and trained by external NGOs); NGOs themselves and their field officers; banks etc. The 'pressure' applied can be in the form of frequent visits to the defaulter, community meetings where they are identified and requested to comply etc.
The Grameen model extensively uses peer pressure to ensure repayment among its borrower groups.