diff --git a/wfe/wfe.go b/wfe/wfe.go
index bb100f037..97f779be1 100644
--- a/wfe/wfe.go
+++ b/wfe/wfe.go
@@ -729,7 +729,6 @@ func (wfe *WebFrontEndImpl) RevokeCertificate(ctx context.Context, logEvent *web
 
 	certStatus, err := wfe.SA.GetCertificateStatus(ctx, serial)
 	if err != nil {
-		logEvent.AddError("unable to get certificate status: %s", err)
 		// TODO(#991): handle db errors
 		wfe.sendError(response, logEvent, probs.NotFound("Certificate status not yet available"), err)
 		return
@@ -820,7 +819,6 @@ func (wfe *WebFrontEndImpl) NewCertificate(ctx context.Context, logEvent *web.Re
 	// and encoding/asn1 will refuse to parse it. If this is the case exit early
 	// with a more useful error message.
 	if len(rawCSR.CSR) >= 10 && rawCSR.CSR[8] == 2 && rawCSR.CSR[9] == 0 {
-		logEvent.AddError("Pre-1.0.2 OpenSSL malformed CSR")
 		wfe.sendError(
 			response,
 			logEvent,
@@ -892,7 +890,6 @@ func (wfe *WebFrontEndImpl) NewCertificate(ctx context.Context, logEvent *web.Re
 	response.Header().Set("Content-Type", "application/pkix-cert")
 	response.WriteHeader(http.StatusCreated)
 	if _, err = response.Write(cert.DER); err != nil {
-		logEvent.AddError(err.Error())
 		wfe.log.Warning(fmt.Sprintf("Could not write response: %s", err))
 	}
 }
@@ -1215,7 +1212,6 @@ func (wfe *WebFrontEndImpl) Authorization(ctx context.Context, logEvent *web.Req
 	id := request.URL.Path
 	authz, err := wfe.SA.GetAuthorization(ctx, id)
 	if err != nil {
-		logEvent.AddError("No such authorization at id %s", id)
 		// TODO(#1199): handle db errors
 		wfe.sendError(response, logEvent, probs.NotFound("Unable to find authorization"), err)
 		return
@@ -1295,7 +1291,6 @@ func (wfe *WebFrontEndImpl) Certificate(ctx context.Context, logEvent *web.Reque
 	}
 	response.WriteHeader(http.StatusOK)
 	if _, err = response.Write(cert.DER); err != nil {
-		logEvent.AddError(err.Error())
 		wfe.log.Warning(fmt.Sprintf("Could not write response: %s", err))
 	}
 	return
@@ -1313,7 +1308,6 @@ func (wfe *WebFrontEndImpl) Issuer(ctx context.Context, logEvent *web.RequestEve
 	response.Header().Set("Content-Type", "application/pkix-cert")
 	response.WriteHeader(http.StatusOK)
 	if _, err := response.Write(wfe.IssuerCert); err != nil {
-		logEvent.AddError("unable to write issuer certificate response: %s", err)
 		wfe.log.Warning(fmt.Sprintf("Could not write response: %s", err))
 	}
 }
diff --git a/wfe2/wfe.go b/wfe2/wfe.go
index 158110a0e..90ec36099 100644
--- a/wfe2/wfe.go
+++ b/wfe2/wfe.go
@@ -1215,7 +1215,6 @@ func (wfe *WebFrontEndImpl) Certificate(ctx context.Context, logEvent *web.Reque
 	response.Header().Set("Content-Type", "application/pem-certificate-chain")
 	response.WriteHeader(http.StatusOK)
 	if _, err = response.Write(responsePEM); err != nil {
-		logEvent.AddError(err.Error())
 		wfe.log.Warning(fmt.Sprintf("Could not write response: %s", err))
 	}
 	return
@@ -1227,7 +1226,6 @@ func (wfe *WebFrontEndImpl) Issuer(ctx context.Context, logEvent *web.RequestEve
 	response.Header().Set("Content-Type", "application/pkix-cert")
 	response.WriteHeader(http.StatusOK)
 	if _, err := response.Write(wfe.IssuerCert); err != nil {
-		logEvent.AddError("unable to write issuer certificate response: %s", err)
 		wfe.log.Warning(fmt.Sprintf("Could not write response: %s", err))
 	}
 }