Each of us have probably sold a project that we have made at one time or another or given it away as a gift. My suggestion is to inform the recipient that the project is not coming apart if a tail happens to pop out after a wash cycle. You may want to include a simple set of instructions on how to sew the tails back in between the stitches.
Many years ago a friend of mine brought me a afghan that her grandma had made, because she thought it was falling apart. The only thing that had happened was some of the tails has popped out after washing. I knotted, secured and sewed the tails back between the stitches with her watching. I let her know that the afghan was not falling apart and that tails could come out again after a wash cycle. She was very relieved to know that was all it was. After that, she knew how to take care of it herself.