Song Permission

As the song is a family song, I asked all of the band members if I could use their song and would they be able to perform in my video. They all agreed verbally, so I thought it would look more professional if I wrote a letter asking them. As two of the band members are currently out of the country, I couldn't get their signature, but they have all agreed. As soon as they return to the United Kingdom, I will have they sign it, and re up load the signed copy.