We delivered garage materials (garage trusses and windows) to our customer's SD site, during the Fall of 2020. They had also purchased a home from us in 2020, that we delivered previously to the same site, which they paid for in full. We have been in sporadic contact with the customer and they keep telling us that the check is in the mail. We even reduced what they owed us from $8,760.13 to $2,000. Can we file a lien on their garage or property or is it too late?