A method for automatic stuffing of printed documents, comprising steps of: A) providing a typographic reel having a web on which a plurality of documents has been sequentially printed, with each document of the plurality of documents paged on at least a page and with at least a first page of each document reporting an identifying code of the relative document; B) making available a series of encoded data codifying the information printed in the plurality of documents, the series of data being processable electronically in order to print at least a document of the plurality of documents; C) automatically separating from the printed web the at least a page of each document of the plurality of documents, such as to obtain at least a relative single printed sheet for each document of the plurality of documents, the printed single sheet having, printed on a side thereof, the at least a page of the relative document; D) automatically forming a document unit for each document of the plurality of documents, piling the relative at least a single printed sheet in such a way that the relative code reported on the first page of the relative document of the plurality of documents is visible from outside each document unit; E) automatically stuffing each formed document unit for obtaining corresponding stuffed envelopes (5, 5') each containing a document unit wherein the relative code is visible from outside each envelope (5, 5'); F) automatically verifying the conformity of each envelope (5, 5') obtained, automatically discarding each non-conforming stuffed envelope and automatically reading the code relating to each conforming stuffed envelope; G) automatically processing the series of encoded data and the codes read during the verification step such as to detect at least a code that has not been read, if present, and in order to generate a further series of encoded data codifying the printed information in at least a document of the plurality of documents relating to the at least a non-read code, the further series of data being usable to print the document; H) automatically printing on at least a single sheet the at least a document of the plurality of documents relating to the at least a non-read code in order to obtain a relative single printed sheet, wherein on a side thereof the at least a page of the document is printed; and I) reiterating steps D-H until a conforming stuffed envelope has been obtained for each single document of the plurality of documents. A) providing a typographic reel having a web on which a plurality of documents has been sequentially printed, with each document of the plurality of documents paged on at least a page and with at least a first page of each document reporting an identifying code of the relative document; B) making available a series of encoded data codifying the information printed in the plurality of documents, the series of data being processable electronically in order to print at least a document of the plurality of documents; C) automatically separating from the printed web the at least a page of each document of the plurality of documents, such as to obtain at least a relative single printed sheet for each document of the plurality of documents, the printed single sheet having, printed on a side thereof, the at least a page of the relative document; D) automatically forming a document unit for each document of the plurality of documents, piling the relative at least a single printed sheet in such a way that the relative code reported on the first page of the relative document of the plurality of documents is visible from outside each document unit; E) automatically stuffing each formed document unit for obtaining corresponding stuffed envelopes (5, 5') each containing a document unit wherein the relative code is visible from outside each envelope (5, 5'); F) automatically verifying the conformity of each envelope (5, 5') obtained, automatically discarding each non-conforming stuffed envelope and automatically reading the code relating to each conforming stuffed envelope; G) automatically processing the series of encoded data and the codes read during the verification step such as to detect at least a code that has not been read, if present, and in order to generate a further series of encoded data codifying the printed information in at least a document of the plurality of documents relating to the at least a non-read code, the further series of data being usable to print the document; H) automatically printing on at least a single sheet the at least a document of the plurality of documents relating to the at least a non-read code in order to obtain a relative single printed sheet, wherein on a side thereof the at least a page of the document is printed; and I) reiterating steps D-H until a conforming stuffed envelope has been obtained for each single document of the plurality of documents.