diff --git a/svc/routes/customer_balance_pdf.go b/svc/routes/customer_balance_pdf.go
index 6a1e26e..4c065ab 100644
--- a/svc/routes/customer_balance_pdf.go
+++ b/svc/routes/customer_balance_pdf.go
@@ -289,7 +289,7 @@ func drawCustomerBalancePDF(
 	}
 
 	wrappedLines := func(text string, w float64) [][]byte {
-		t := strings.TrimSpace(text)
+		t := strings.TrimSpace(sanitizePDFText(text))
 		if t == "" {
 			t = "-"
 		}
@@ -321,7 +321,7 @@ func drawCustomerBalancePDF(
 		cy := startY
 		for _, ln := range lines {
 			pdf.SetXY(x+1, cy)
-			pdf.CellFormat(w-2, lineH, string(ln), "", 0, align, false, 0, "")
+			pdf.CellFormat(w-2, lineH, sanitizePDFText(string(ln)), "", 0, align, false, 0, "")
 			cy += lineH
 		}
 	}
@@ -404,7 +404,7 @@ func drawCustomerBalancePDF(
 				drawWrapped(v, x, y, summaryW[i], rowH, 3.2, "L")
 			} else {
 				pdf.SetXY(x+1, y+(rowH-4.2)/2)
-				pdf.CellFormat(summaryW[i]-2, 4.2, v, "", 0, align, false, 0, "")
+				pdf.CellFormat(summaryW[i]-2, 4.2, sanitizePDFText(v), "", 0, align, false, 0, "")
 			}
 			x += summaryW[i]
 		}
@@ -491,7 +491,7 @@ func drawCustomerBalancePDF(
 					drawWrapped(v, rowX, rowY, detailW[i], rowH, 3.0, "L")
 				} else {
 					pdf.SetXY(rowX+1, rowY+(rowH-4.0)/2)
-					pdf.CellFormat(detailW[i]-2, 4.0, v, "", 0, align, false, 0, "")
+					pdf.CellFormat(detailW[i]-2, 4.0, sanitizePDFText(v), "", 0, align, false, 0, "")
 				}
 				rowX += detailW[i]
 			}
@@ -555,3 +555,17 @@ func absFloat(v float64) float64 {
 	}
 	return v
 }
+
+func sanitizePDFText(s string) string {
+	s = strings.ToValidUTF8(s, "?")
+	s = strings.ReplaceAll(s, "\x00", " ")
+	return strings.Map(func(r rune) rune {
+		if r == '\n' || r == '\r' || r == '\t' {
+			return ' '
+		}
+		if r < 32 {
+			return -1
+		}
+		return r
+	}, s)
+}
diff --git a/svc/routes/statement_aging_pdf.go b/svc/routes/statement_aging_pdf.go
index 8ee3eba..e5947bd 100644
--- a/svc/routes/statement_aging_pdf.go
+++ b/svc/routes/statement_aging_pdf.go
@@ -327,21 +327,21 @@ func drawStatementAgingPDF(pdf *gofpdf.Fpdf, p models.StatementAgingParams, mast
 		pdf.SetFont("dejavu", "B", 15)
 		pdf.SetTextColor(colorPrimary[0], colorPrimary[1], colorPrimary[2])
 		pdf.SetXY(marginL, marginT)
-		pdf.CellFormat(150, 7, "Cari Yaşlandırmalı Ekstre", "", 0, "L", false, 0, "")
+		pdf.CellFormat(150, 7, sanitizePDFText("Cari Yaşlandırmalı Ekstre"), "", 0, "L", false, 0, "")
 
 		pdf.SetFont("dejavu", "", 9)
 		pdf.SetTextColor(20, 20, 20)
 		pdf.SetXY(pageW-marginR-95, marginT+1)
-		pdf.CellFormat(95, 5, "Son Tarih: "+p.EndDate, "", 0, "R", false, 0, "")
+		pdf.CellFormat(95, 5, sanitizePDFText("Son Tarih: "+p.EndDate), "", 0, "R", false, 0, "")
 		pdf.SetXY(pageW-marginR-95, marginT+6)
-		pdf.CellFormat(95, 5, "Cari: "+p.AccountCode, "", 0, "R", false, 0, "")
+		pdf.CellFormat(95, 5, sanitizePDFText("Cari: "+p.AccountCode), "", 0, "R", false, 0, "")
 
 		mode := "1_2"
 		if len(p.Parislemler) > 0 {
 			mode = strings.Join(p.Parislemler, ",")
 		}
 		pdf.SetXY(pageW-marginR-95, marginT+11)
-		pdf.CellFormat(95, 5, "Parasal İşlem: "+mode, "", 0, "R", false, 0, "")
+		pdf.CellFormat(95, 5, sanitizePDFText("Parasal İşlem: "+mode), "", 0, "R", false, 0, "")
 
 		pdf.SetDrawColor(colorPrimary[0], colorPrimary[1], colorPrimary[2])
 		pdf.Line(marginL, marginT+16, pageW-marginR, marginT+16)
@@ -362,7 +362,7 @@ func drawStatementAgingPDF(pdf *gofpdf.Fpdf, p models.StatementAgingParams, mast
 		for i, c := range cols {
 			pdf.Rect(x, y, widths[i], h, "DF")
 			pdf.SetXY(x+0.8, y+1.0)
-			pdf.CellFormat(widths[i]-1.6, h-2.0, c, "", 0, "C", false, 0, "")
+			pdf.CellFormat(widths[i]-1.6, h-2.0, sanitizePDFText(c), "", 0, "C", false, 0, "")
 			x += widths[i]
 		}
 		pdf.SetY(y + h)
@@ -387,7 +387,7 @@ func drawStatementAgingPDF(pdf *gofpdf.Fpdf, p models.StatementAgingParams, mast
 				align = "C"
 			}
 			pdf.SetXY(x+0.8, y+0.8)
-			pdf.CellFormat(widths[i]-1.6, h-1.6, v, "", 0, align, false, 0, "")
+			pdf.CellFormat(widths[i]-1.6, h-1.6, sanitizePDFText(v), "", 0, align, false, 0, "")
 			x += widths[i]
 		}
 		pdf.SetY(y + h)