Insurance guarantees are perfect instruments for all the companies participating in public competitions and tenders, the purpose of which is to select the contractors for the Principals called the guarantee Beneficiaries. Due to the guarantee, obtained from the Insurer and accepted by the Beneficiary, the company does not need to freeze its own financial assets for the purpose of providing the required security in the scope specified in the terms of reference. In the case of using insurance guarantees, the Contractor also does not bear the risk associated with the possibility to lose the amounts retained by the Principal towards security, in the case of its bankruptcy.