dear the case as below
1- the first party awarded a project from the client.
2- after a year the first party faced financial issues.
3- the first party approached the second party to complete the project on his behalf.
4- the second party couldn't apply for Bonds.
5- the second party requested to the first party to keep his bond valid.
6- the second party promised the first party that's the client will not liquidate the bonds of the first party as the second party has a good relationship with the client.
7- the first party and second party and client all agreed on above.
how can put above agreement in legal form?