A label for certifying a document, the label comprising at least the following: - a first label portion destined for transferring a seal or of another certification mark suitable for certifying a document to a document, and a second label portion usable as a handle tab for handling the first label portion, the first label portion and the second label portion representing two different surface areas of the label, - a transparent film formed in the first label portion and in the second label portion and arranged at a front side of the label, - a rear-side adhesive layer formed in both the first label portion and the second label portion, - a rear-side support layer located under the adhesive layer, which is formed in both the first label portion and the second label portion and which can be peeled off the adhesive layer, and - a perforation or another weakening line disposed between the first label portion and the second label portion and extending through the label or through part of the layer thickness of the label, but at least through the transparent film, - wherein the first label portion comprises a front-side part and a rear-side part, - wherein the rear-side part of the first label portion comprises a seal or other certification mark suitable for certifying a document, and the front-side part of the first label portion comprises at least the transparent film, - wherein the rear-side part can be peeled off the front-side part for transferring the seal or other certification mark to a document, and - wherein the rear-side part of the first label portion and the second label portion are provided with an imprint or other inscription and/or can be provided therewith. - a first label portion destined for transferring a seal or of another certification mark suitable for certifying a document to a document, and a second label portion usable as a handle tab for handling the first label portion, the first label portion and the second label portion representing two different surface areas of the label, - a transparent film formed in the first label portion and in the second label portion and arranged at a front side of the label, - a rear-side adhesive layer formed in both the first label portion and the second label portion, - a rear-side support layer located under the adhesive layer, which is formed in both the first label portion and the second label portion and which can be peeled off the adhesive layer, and - a perforation or another weakening line disposed between the first label portion and the second label portion and extending through the label or through part of the layer thickness of the label, but at least through the transparent film, - wherein the first label portion comprises a front-side part and a rear-side part, - wherein the rear-side part of the first label portion comprises a seal or other certification mark suitable for certifying a document, and the front-side part of the first label portion comprises at least the transparent film, - wherein the rear-side part can be peeled off the front-side part for transferring the seal or other certification mark to a document, and - wherein the rear-side part of the first label portion and the second label portion are provided with an imprint or other inscription and/or can be provided therewith.