I'm a subcontractor and finish a job, last year, I had to file a mechanical lien in December 2020, they issued a check to my suppliers but to us they are asking me for a Conditional Final, my question is "if I write a note on the conditional as " this amount is valid only if a joint check is issued by the owner of the project" .... the reason is I don't trust this company will issue a total amount agreed minus the suppliers payment check, and that was not the deal . Can you let me know if its a legally valid to add that note?