diff --git a/api-v3/src/inspection-closing/dto/company-signature-invite.dto.ts b/api-v3/src/inspection-closing/dto/company-signature-invite.dto.ts
new file mode 100644
index 0000000..110b4e1
--- /dev/null
+++ b/api-v3/src/inspection-closing/dto/company-signature-invite.dto.ts
@@ -0,0 +1,101 @@
+import { Transform, Type } from 'class-transformer';
+import {
+  IsBoolean,
+  IsEmail,
+  IsIn,
+  IsInt,
+  IsOptional,
+  IsString,
+  Max,
+  MaxLength,
+  Min,
+  MinLength,
+  ValidateIf,
+} from 'class-validator';
+
+export class CreateCompanySignatureInviteDto {
+  @IsOptional()
+  @Transform(({ value }) => typeof value === 'string' && value.trim() ? value.trim().toLowerCase() : undefined)
+  @IsEmail()
+  @MaxLength(320)
+  recipientEmail?: string;
+
+  @IsOptional()
+  @Type(() => Number)
+  @IsInt()
+  @Min(1)
+  @Max(30)
+  expiresInDays?: number;
+}
+
+export class PublicCompanySignatureDto {
+  @Transform(({ value }) => typeof value === 'string' ? value.trim() : value)
+  @IsString()
+  @MinLength(2)
+  @MaxLength(200)
+  fullName!: string;
+
+  @Transform(({ value }) => typeof value === 'string' ? value.trim().toUpperCase() : value)
+  @IsString()
+  @IsIn(['DNI', 'CUIL', 'PASSPORT', 'OTHER'])
+  documentType!: string;
+
+  @Transform(({ value }) => typeof value === 'string' ? value.trim() : value)
+  @IsString()
+  @MinLength(3)
+  @MaxLength(40)
+  documentNumber!: string;
+
+  @Transform(({ value }) => typeof value === 'string' ? value.trim() : value)
+  @IsString()
+  @MinLength(2)
+  @MaxLength(200)
+  position!: string;
+
+  @Transform(({ value }) => typeof value === 'string' ? value.trim().toUpperCase() : value)
+  @IsString()
+  @IsIn(['CONFORMITY', 'DISSENT'])
+  manifestation!: 'CONFORMITY' | 'DISSENT';
+
+  @ValidateIf((value: PublicCompanySignatureDto) => value.manifestation === 'DISSENT')
+  @Transform(({ value }) => typeof value === 'string' ? value.trim() : value)
+  @IsString()
+  @MinLength(10)
+  @MaxLength(8000)
+  statement?: string;
+
+  @Transform(({ value }) => value === true || value === 'true')
+  @IsBoolean()
+  consentAccepted!: boolean;
+}
+
+export class PublicCompanyRefusalDto {
+  @Transform(({ value }) => typeof value === 'string' ? value.trim() : value)
+  @IsString()
+  @MinLength(2)
+  @MaxLength(200)
+  fullName!: string;
+
+  @Transform(({ value }) => typeof value === 'string' ? value.trim().toUpperCase() : value)
+  @IsString()
+  @IsIn(['DNI', 'CUIL', 'PASSPORT', 'OTHER'])
+  documentType!: string;
+
+  @Transform(({ value }) => typeof value === 'string' ? value.trim() : value)
+  @IsString()
+  @MinLength(3)
+  @MaxLength(40)
+  documentNumber!: string;
+
+  @Transform(({ value }) => typeof value === 'string' ? value.trim() : value)
+  @IsString()
+  @MinLength(2)
+  @MaxLength(200)
+  position!: string;
+
+  @Transform(({ value }) => typeof value === 'string' ? value.trim() : value)
+  @IsString()
+  @MinLength(10)
+  @MaxLength(8000)
+  reason!: string;
+}