Pennsylvania Signature Form For PA Open For Business Electronic Filing is a secure form used to digitally sign documents and legally bind a business to the state of Pennsylvania. This form is used to electronically file tax returns, business registration documents, and other business transactions with the Pennsylvania Department of Revenue. There are three primary types of Pennsylvania Signature Forms: Organizational Signature Forms, Individual Signature Forms, and Combination Signature Forms. Organizational Signature Forms are used to authorize a representative of a business entity to sign documents on behalf of the business. Individual Signature Forms are used to authorize an individual to sign documents on behalf of the business. Combination Signature Forms are used to authorize a representative of a business entity and an individual to sign documents on behalf of the business.