1. A seal application device comprising: an applicator; at least one processor; and a memory storing instructions which, when executed by the at least one processor, cause the at least one processor to perform operations comprising: determining a source user of the seal application device, the source user associated with a physical object; determining a source identifier that identifies the source user; and instructing the applicator to generate a seal that encodes the source identifier of the source user, the seal being applicable to the physical object and including a near field communication (NFC) tag that, when scanned, emits a signal carrying the source identifier, wherein the NFC tag is configured to remove the source identifier from the NFC tag in response to a first scan of the NFC tag.
1. A seal application device comprising: an applicator; at least one processor; and a memory storing instructions which, when executed by the at least one processor, cause the at least one processor to perform operations comprising: determining a source user of the seal application device, the source user associated with a physical object; determining a source identifier that identifies the source user; and instructing the applicator to generate a seal that encodes the source identifier of the source user, the seal being applicable to the physical object and including a near field communication (NFC) tag that, when scanned, emits a signal carrying the source identifier, wherein the NFC tag is configured to remove the source identifier from the NFC tag in response to a first scan of the NFC tag. 5. The seal application device of claim 1 , wherein: the seal application device further comprises a network interface; the operations further comprise receiving, through the network interface from an external service, an object identifier that identifies the physical object; and the seal further encodes the object identifier that identifies the physical object.