Dreaming of letting others sign the document means that the dreamer has both material gains, reputation success and fame and fortune.
The following is the psychological explanation of dreaming of signing a contract:
Signing a contract will ruin the money. People never need to sign anything. Only when they sell or transfer something, they need to sign their own names to approve the transaction on their own behalf. So the signature in the dream represents the loss of property.
For entertainment only, superstition is not credible!