diff --git a/eclair-fuzz/src/test/scala/fr/acinq/eclair/payment/Bolt11InvoiceFuzzTest.scala b/eclair-fuzz/src/test/scala/fr/acinq/eclair/payment/Bolt11InvoiceFuzzTest.scala
new file mode 100644
index 0000000000..bc30b85293
--- /dev/null
+++ b/eclair-fuzz/src/test/scala/fr/acinq/eclair/payment/Bolt11InvoiceFuzzTest.scala
@@ -0,0 +1,31 @@
+package fr.acinq.eclair.payment
+
+import com.code_intelligence.jazzer.api.FuzzedDataProvider
+import com.code_intelligence.jazzer.junit.FuzzTest
+import fr.acinq.bitcoin.Bech32
+
+/**
+ * Fuzz tests for Bolt 11 invoice deserialization.
+ */
+class Bolt11InvoiceFuzzTest {
+
+  @FuzzTest(maxDuration = "")
+  def fuzzBolt11Invoice(data: FuzzedDataProvider): Unit = {
+    val hrp = data.consumeAsciiString(data.consumeInt(1, 83))
+    val int5s: Array[java.lang.Byte] = data.consumeRemainingAsBytes().map(b => (Math.floorMod(b, 32).toByte): java.lang.Byte)
+
+    val invoiceStr = try {
+      Bech32.encode(hrp, int5s, Bech32.Encoding.Bech32)
+    } catch {
+      case _: Exception => return
+    }
+
+    val invoice = Bolt11Invoice.fromString(invoiceStr)
+    if (invoice.isFailure) return
+
+    val encoded = invoice.get.toString
+    val invoice2 = Bolt11Invoice.fromString(encoded)
+    assert(invoice2.isSuccess)
+    assert(encoded == invoice2.get.toString)
+  }
+}
diff --git a/eclair-fuzz/src/test/scala/fr/acinq/eclair/payment/Bolt12InvoiceFuzzTest.scala b/eclair-fuzz/src/test/scala/fr/acinq/eclair/payment/Bolt12InvoiceFuzzTest.scala
new file mode 100644
index 0000000000..cd439a29d4
--- /dev/null
+++ b/eclair-fuzz/src/test/scala/fr/acinq/eclair/payment/Bolt12InvoiceFuzzTest.scala
@@ -0,0 +1,98 @@
+package fr.acinq.eclair.payment
+
+import com.code_intelligence.jazzer.junit.FuzzTest
+import fr.acinq.bitcoin.Bech32
+import fr.acinq.eclair.wire.protocol.OfferTypes.{InvoiceRequest, Offer}
+import org.junit.jupiter.params.provider.MethodSource
+
+/**
+ * Fuzz tests for Bolt 12 offer, invoice request, and invoice deserialization.
+ */
+class Bolt12InvoiceFuzzTest {
+
+  @MethodSource(Array("offerSeeds"))
+  @FuzzTest(maxDuration = "")
+  def fuzzOffer(data: Array[Byte]): Unit = {
+    val offerStr = try {
+      Bech32.encodeBytes(Offer.hrp, data, Bech32.Encoding.Beck32WithoutChecksum)
+    } catch {
+      case _: Exception => return
+    }
+
+    val offer = Offer.decode(offerStr)
+    if (offer.isFailure) return
+
+    val encoded = offer.get.encode()
+    val offer2 = Offer.decode(encoded)
+    assert(offer2.isSuccess)
+    assert(offer.get == offer2.get)
+  }
+
+  @MethodSource(Array("invoiceRequestSeeds"))
+  @FuzzTest(maxDuration = "")
+  def fuzzInvoiceRequest(data: Array[Byte]): Unit = {
+    val invoiceReqStr = try {
+      Bech32.encodeBytes(InvoiceRequest.hrp, data, Bech32.Encoding.Beck32WithoutChecksum)
+    } catch {
+      case _: Exception => return
+    }
+
+    val invoiceReq = InvoiceRequest.decode(invoiceReqStr)
+    if (invoiceReq.isFailure) return
+
+    val encoded = invoiceReq.get.encode()
+    val invoiceReq2 = InvoiceRequest.decode(encoded)
+    assert(invoiceReq2.isSuccess)
+    assert(invoiceReq.get == invoiceReq2.get)
+  }
+
+  @MethodSource(Array("bolt12InvoiceSeeds"))
+  @FuzzTest(maxDuration = "")
+  def fuzzBolt12Invoice(data: Array[Byte]): Unit = {
+    val invoiceStr = try {
+      Bech32.encodeBytes(Bolt12Invoice.hrp, data, Bech32.Encoding.Beck32WithoutChecksum)
+    } catch {
+      case _: Exception => return
+    }
+
+    val invoice = Bolt12Invoice.fromString(invoiceStr)
+    if (invoice.isFailure) return
+
+    val encoded = invoice.get.toString
+    val invoice2 = Bolt12Invoice.fromString(encoded)
+    assert(invoice2.isSuccess)
+    assert(invoice.get == invoice2.get)
+  }
+
+  @FuzzTest(maxDuration = "")
+  def fuzzMinimalBolt12Invoice(data: Array[Byte]): Unit = {
+    val invoiceStr = try {
+      Bech32.encodeBytes(MinimalBolt12Invoice.hrp, data, Bech32.Encoding.Beck32WithoutChecksum)
+    } catch {
+      case _: Exception => return
+    }
+
+    val invoice = MinimalBolt12Invoice.fromString(invoiceStr)
+    if (invoice.isFailure) return
+
+    val encoded = invoice.get.toString
+    val invoice2 = MinimalBolt12Invoice.fromString(encoded)
+    assert(invoice2.isSuccess)
+    assert(invoice.get == invoice2.get)
+  }
+}
+
+object Bolt12InvoiceFuzzTest {
+
+  private val OFFER_SEED = "lno1qgsyxjtl6luzd9t3pr62xr7eemp6awnejusgf6gw45q75vcfqqqqqqqgqyeq5ym0venx2u3qwa5hg6pqw96kzmn5d968jys3v9kxjcm9gp3xjemndphhqtnrdak3gqqkyypsmuhrtwfzm85mht4a3vcp0yrlgua3u3m5uqpc6kf7nqjz6v70qwg"
+  private val INVOICE_REQUEST_SEED = "lnr1qqp6hn00zcssxr0juddeytv7nwawhk9nq9us0arnk8j8wnsq8r2e86vzgtfneupe2gp9yzzcyypymkt4c0n6rhcdw9a7ay2ptuje2gvehscwcchlvgntump3x7e7tc0sgp9k43qeu892gfnz2hrr7akh2x8erh7zm2tv52884vyl462dm5tfcahgtuzt7j0npy7getf4trv5d4g78a9fkwu3kke6hcxdr6t2n7vz"
+  private val BOLT12_INVOICE_SEED = "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"
+
+  private def decode(bech32: String): Array[Byte] = Bech32.decodeBytes(bech32.toLowerCase, true).getSecond
+
+  def offerSeeds(): Array[Array[Byte]] = Array(decode(OFFER_SEED))
+
+  def invoiceRequestSeeds(): Array[Array[Byte]] = Array(decode(INVOICE_REQUEST_SEED))
+
+  def bolt12InvoiceSeeds(): Array[Array[Byte]] = Array(decode(BOLT12_INVOICE_SEED))
+}