Home Update of existing API resource (REG) Any request for the maintenance of existing ISO 20022 Message Definitions must be submitted to the ISO 20022 RA, using the form below. Please download and fill in the Change Request (CR) as you will have to attach it to the submission form. Download the Change Request document Name of the API Resource change request Example: addition of Account to the pay Later API resource. Contact first name Contact last name Contact e-mail(s) Multiple email addresses may be separated by commas. Emails are only sent to cc and bcc addresses if a To email address is provided. Submitter(s) Please indicate the name of the organisation(s) that are requesting the update of the API Resource(s). Submitter(s) can be (an) organisation(s), group(s) of users, regulator(s) etc. Your API Resource change request Upload Please upload your API Resource change request document filled in with the required fields.One file only.20 MB limit.Allowed types: xls, xlsx, doc, docx, pdf, zip, rar, winrar. What code is in the image? Enter the characters shown in the image. Submit Leave this field blank