I think it should be like this. Did this construction project start before you left your job, or did it start after you left your job? If you have started construction before you leave your job, then you will draw the as-built drawings. That may require your signature. However, if the construction of this project started after you left your job, and the as-built drawings and design drawings began to appear, it would be a bit unreasonable for you to sign. Because you are a resigned person and have nothing to do with your work unit, it should be wrong for any document with your name to appear in the work list.