Form GNL-4 addendum for rectifying defects or incompleteness in company filings, including attachments and digital verification. Form No. GNL-4 provides the procedure to file an addendum rectifying defects or incompleteness in a previously filed company eForm: it requires the original SRN and form number, company identifiers and contact details, description of defects and the rectifications made, SRN/amounts for additional stamp duty, up to five attachments, and verification by prescribed signatories with digital signature and optional professional certification that attachments are true and complete.