LinkShare Signature tracks commerce to the transaction level for each individual member, organization, or subsite through the use of the Member ID field.

The Member ID field is denoted by a "&u1=" that Signature Publishers must append to the advertiser link codes provided in their LinkShare account. The value following the "=" sign represents the specific member, organization, or subsite created by the Signature Publisher. The Member ID field can be up to 72 alphanumeric characters in length.

For more information on Signature, Email us at signature@linkshare.com or see the Signature Overview attachment.