diff --git a/PyPDFForm/core/filler.py b/PyPDFForm/core/filler.py
index a09dcfb1..366c21d4 100644
--- a/PyPDFForm/core/filler.py
+++ b/PyPDFForm/core/filler.py
@@ -41,6 +41,7 @@ def fill(
         for _widget in _widgets:
             key = get_widget_key(_widget)
             text_needs_to_be_drawn = False
+            _to_draw = x = y = None
 
             if isinstance(widgets[key], (Checkbox, Radio)):
                 font_size = checkbox_radio_font_size(_widget)
@@ -69,7 +70,6 @@ def fill(
                             height,
                         ]
                     )
-                    text_needs_to_be_drawn = False
             else:
                 widgets[key].text_line_x_coordinates = get_text_line_x_coordinates(
                     _widget, widgets[key]
@@ -78,7 +78,14 @@ def fill(
                 _to_draw = widgets[key]
                 text_needs_to_be_drawn = True
 
-            if text_needs_to_be_drawn:
+            if all(
+                [
+                    text_needs_to_be_drawn,
+                    _to_draw is not None,
+                    x is not None,
+                    y is not None,
+                ]
+            ):
                 texts_to_draw[page].append(
                     [
                         _to_draw,
diff --git a/docs/fill.md b/docs/fill.md
index 4cf5e432..0761fe9f 100644
--- a/docs/fill.md
+++ b/docs/fill.md
@@ -90,5 +90,5 @@ with open("output.pdf", "wb+") as output:
     output.write(signed.read())
 ```
 
-**NOTE:** As described [here](install.md/#create-a-pdf-wrapper), the value of the signature in your dictionary can be a file path shown above, but also an open file object and a file stream 
-that's in `bytes`.
+**NOTE:** As described [here](install.md/#create-a-pdf-wrapper), the value of the signature in your dictionary can be 
+a file path shown above, but also an open file object and a file stream that's in `bytes`.
diff --git a/image_samples/sample_signature.png b/image_samples/sample_signature.png
index 44d9f9ee..532628af 100644
Binary files a/image_samples/sample_signature.png and b/image_samples/sample_signature.png differ
diff --git a/pdf_samples/signature/test_fill_signature.pdf b/pdf_samples/signature/test_fill_signature.pdf
index 68d39155..ee0a72bc 100644
Binary files a/pdf_samples/signature/test_fill_signature.pdf and b/pdf_samples/signature/test_fill_signature.pdf differ
diff --git a/pdf_samples/signature/test_fill_signature_overlap.pdf b/pdf_samples/signature/test_fill_signature_overlap.pdf
index 2d8faca3..092cb9e2 100644
Binary files a/pdf_samples/signature/test_fill_signature_overlap.pdf and b/pdf_samples/signature/test_fill_signature_overlap.pdf differ