@Ariana4--Hello & welcome to the OfferUp Community Forum!! It's important for your safety that you don't share personal information with others, & keep all communication with in the OfferUp app. You can reach out to customer care for further assistance:
Error; R37KPRMM or messages saying your about to Violate OfferUp guidelines
Usually mean you are doing something against OfferUp guidelines, which is fixable! Just make sure you aren't sending out personal information or sending people the same exact message as it may be flagged as spam. or perhaps a mislabeled server error if you believe you've done nothing wrong.
If you're in good standing the issue will resolve itself. You should be able to message after 24/48 hours, if not I would recommend contact OfferUp customer care from the link below. I have also added the OfferUp selling app guidelines below as well. 🇬🇧😎🔚
Aaryana3Maat If you are finding yourself being asked to join TruYou, it's either because you have high-risk items or something you are doing is not following the Posting Rules. So make sure you are not screen shooting items and spamming, you're not including personal information such as address or phone numbers, etc. I’ll also add the customer care link below if needed. 😎🇬🇧🔚
You can also contact OfferUp through Twitter at OfferUp if this option is available to you.