Abstract: A system for verifying completion of a construction task is provided, wherein the system receives verification data from an electronic device of a building party indicating that a construction task has been completed, and responsively transmits, to a verifying party, a request to verify the completion of the task based on the verification data. A system for facilitating payment using a digital wallet is provided, wherein the system executes a deposit into the wallet based on a first identification code received and executes a withdrawal request based on a second identification code received. A system for verifying presence of a worker at a work site is provided, wherein a first electronic device detects the presence of a worker, such as by detecting the presence of the worker's electronic device, and automatically prompts a user of the first electronic device to confirm the worker's presence.