What should I do about my intense anxiety concerning my guarantee of a person for a loan, and should I withdraw the guarantee with the resulting embarrassment?

Guarantee is divided into two categories: unlawful and lawful. Unlawful guarantee is like guaranteeing a borrower for an interest-based loan, and the guarantor is considered an accomplice to sin. He must repent and withdraw the guarantee if possible. As for lawful guarantee, it is like guaranteeing the price of a commodity in a lawful sale. The guarantor is rewarded for his intention. He is not absolved from the guarantee إلا by the release of the guaranteed party through payment, or absolution, or transfer of debt, or termination of the contract.